The number of bones
in a human body
THE NUMBER OF BONES IN A HUMAN BODY
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THE NUMBER OF BONES IN A HUMAN BODY.
Table Of Contents
04
There are 29 bones in the human head.
08 12
Human‘s arms have 54 bones, and they formed a human upper limb.
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06 Humans have 24 ribs (12 pairs). The first seven sets of ribs, known as "true ribs"
14 The pelvis is made up of 6 bones: 2 ilium bones, 2 ischium bones and 2 pubic bones
in hunman's cervical vertebrae
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In the human vertebral column there are normally thirty-three vertebrae
The lumbar vertebrae consist of five individual cylindrical bones that form the spine in the lower back.
18 There are 206 bones in the human's body
There are 62 bones in the human's leg and feet.
THE NUMBER OF BONES IN A HUMAN BODY
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07 bones
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4
THE NUMBER OF BONES IN A HUMAN BODY.
X-ray image of
human head
29 They consist of 8 cranial bones, 14 facial bones,
The human skull is the bony structure that forms
the hyoid bone, and 6 auditory (ear) bones.
the head in the human skeleton. It supports the
The 8 cranial bones are the frontal, 2 parietal,
structures of the face and forms a cavity for the brain.
occipital, 2 temporal, sphenoid, and ethmoid
Like the skulls of other vertebrates, it protects the
bones. The 14 facial bones are the maxilla,
brain from injury.
vomer and 2 palate bones.The hyoid bone is horseshoe-shaped bone at the base of the
tongue. The 6 auditory ossicles (little bones) are the malleus, incus and stapes in each ear.
The skull consists of two parts, of different
embryological origin–the neurocranium and the
facial skeleton (also called the viscerocranium). The neurocranium (or braincase) forms the protective cranial cavity that surrounds and houses the brain and brainstem. The facial skeleton is formed by the bones supporting the face.
THE NUMBER OF BONES IN A HUMAN BODY
mandible, zygoma, lacrimal, nasal,turbinate,
There are 29 bones in a human head.
5
07bones
THE NUMBER OF BONES IN A HUMAN BODY.
in a hunman cervical vertebrae
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In many species, though not in mammals, the cervical vertebrae bear ribs. In many other groups, such as lizards and saurischian dinosaurs, the cervical ribs are large; in birds, they are small and completely fused to the vertebrae. The vertebral transverse processes of mammals are homologous to the cervical ribs of other amniotes. In vertebrates, cervical vertebrae (singular: vertebra) are the vertebrae of the neck, immediately below the skull. Thoracic vertebrae in all mammalian species are those vertebrae that also carry a pair of ribs, and lie caudal to the cervical vertebrae. Further caudally follow the lumbar vertebrae, which also belong to the trunk, but do not carry ribs. In reptiles, all trunk vertebrae carry ribs and are called dorsal vertebrae. In humans, cervical vertebrae are the smallest of the true vertebrae, and can be readily distinguished from those of the thoracic or lumbar regions by the presence of a foramen (hole) in each transverse process, through which the vertebral artery
THE NUMBER OF BONES IN A HUMAN BODY
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24 Humans have 24 ribs (12 pairs). The first seven sets of ribs, known as "true ribs"
H
umans have 24 ribs (12 pairs). The first seven sets of ribs, known as "true ribs" (costae verae) also known as vertebrosternal ribs, are directly attached to the sternum through the costal
cartilage. Rib 1 is unique and harder to distinguish than other ribs. It is a short, flat, C-shaped bone. The vertebral attachment can be found just below the neck and the majority of this bone can be found above
THE NUMBER OF BONES IN A HUMAN BODY.
the level of the clavicle. The ribcage is separated from the lower abdomen
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by the thoracic diaphragm which controls breathing. W h e n t h e diaphragm contracts, the thoracic cavity is expanded, reducing intrathoracic pressure and drawing air into the lungs.
This happens through one of two actions (or a mix of the two): when the lower ribs the diaphragm connects to are stabilized by muscles and the central tendon is mobile, when the muscle contracts t h e central tendon is drawn down, compressing the cavity under neath and expanding the thoracic cavity downward.
In general, human ribs increase in length from ribs 1 through 7 and decrease in length again through rib 12. Along with this change in size, the ribs become progressively oblique (slanted) from ribs 1through 9, then less slanted through rib.
human chest, with ribs labelled
THE NUMBER OF BONES IN A HUMAN BODY
X-ray image of
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33 In a human vertebral column there are normally thirty-three vertebrae
THE NUMBER OF BONES IN A HUMAN BODY.
T
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he vertebral column, also known as the
the cervical spine, thoracic spine, lumbar spine,
backbone or spine, is par t of the axial
sacrum and coccyx. There are seven cervical
skeleton. The vertebral column is the defining
ver tebrae, t welve thoracic ver tebrae and five
characteristic of a vertebrate, in which the notochord
lumbar vertebrae. The number of vertebrae in a region
(a flexible rod of uniform composition) found in all
can var y but overall the number remains the
chordates has been replaced by a segmented series
same. The number of those in the cervical region
of bones–vertebrae separated by intervertebral discs.
however is only rarely changed.The vertebrae
The vertebral column houses the spinal canal,a cavity
of the cervical, thoraic and lumbar spines are
that encloses and protects the spinal cord.
independent bones, and generally quite similar.
The vertebrae in the human vertebral column are
The vertebrae of the sacrum and coccyx are usually
divided into different regions, which correspond to the
fused and unable to move independently. Two
curves of the spinal column. The ar ticulating
special vertebrae are the atlas and axis, on which
vertebrae are named according to their region of the
the head rests.
spine. Vertebrae in these regions are essentially alike, with minor variation. These regions are called
human vertebral column.
THE NUMBER OF BONES IN A HUMAN BODY
Photo of
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54 Human‘s arms have 54 bones, and they formed a human upper limb.
The humerus is one of the three long bones of the arm. It joins with the scapula at the shoulder joint and with the other long bones of the arm, the ulna and radius at the elbow joint. The elbow is the hinge joint between the end of the humerus and the ends of the radius and ulna. The humerus cannot be broken easily. Its strength allows it to handle
THE NUMBER OF BONES IN A HUMAN BODY.
loading up to 300 pounds (140 kg).
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Photo of human arm
Photo of human arm
Photo of human hand
The human hand has five fingers and 27 bones, not including the sesamoid bone, the number of which varies between people,[3] 14 of which are the phalanges (proximal, intermediate and distal) of the fingers. The metacarpal bones connect the fingers and the carpal bones of the wrist. Each human carpal bones.
THE NUMBER OF BONES IN A HUMAN BODY
hand has five metacarpals[4] and eight
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14
THE NUMBER OF BONES IN A HUMAN BODY.
Photo of
human lumbar
05 The lumbar vertebrae consist of five individual cylindrical bones that form the spine in the lower back.
In tetrapod anatomy, lumbar is an adjective that means of or pertaining to the abdominal segment of the torso, between the diaphragm and the sacrum. The lumbar region is sometimes referred to as the lower spine, or as an area of the back in its proximity. In human anatomy the five vertebrae in the lumbar region of the back are the largest and strongest in the movable part of the spinal column, and can be distinguished by the absence of a foramen in the transverse process, and by the absence of facets on the
the spine curves outward. The actual spinal cord (medulla spinalis) terminates between vertebrae one and two of this series, called L1 and L2. The nervous tissue that extends below this point are individual strands that collectively form the cauda equina. In human anatomy the five vertebrae in the lumbar region of the back are the largest and strongest in the movable part of the spinal column, and can be distinguished by the absence of a foramen in the transverse process, and by the absence of facets on the sides of the body.
THE NUMBER OF BONES IN A HUMAN BODY
sides of the body.
In most mammals, the lumbar region of
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06 The pelvis is made up of 6 bones: 2 ilium bones, 2 ischium bones and 2 pubic bones
T
he pelvis (plural pelvises) is either the lower part of the trunk of the human
THE NUMBER OF BONES IN A HUMAN BODY.
body between the abdomen and the
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thighs (sometimes also called pelvic region
The pelvic region of the trunk includes
The two hip bones connect the spine with
of the trunk) or the skeleton embedded
the bony pelvis, the pelvic cavity (the
the lower limbs. They are attached to the
in it(sometimes also called bony pelvis, or
space enclosed by the bony pelvis), the
sacrum posteriorly, connected to each other
pelvic skeleton).
pelvic floor, below the pelvic cavity, and
anteriorly, and joined with the two femurs
the perineum, below the pelvic floor.The
at the hip joints. The gap enclosed by the bony
pelvic skeleton is formed in athe area
pelvis, called the pelvic cavity, is the section
of the back, by the sacrum and the coccyx
of the body underneath the abdomen and
and anteriorly and to the left and right
mainly consists of the reproductive organs
sides, by a pair of hip bones.
(sex organs) and the rectum.
Photo of
human pelvis
THE NUMBER OF BONES IN A HUMAN BODY
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Photo of human leg
The human leg, in the general sense, is the entire lower extremity or limb of the human body, including the foot, thigh and
The human foot is a strong and complex
even the hip or gluteal region; however,
mechanical structure containing 26
the definition in human anatomy refers
bones, 33 joints (20 of which are actively
only to the section of the lower limb
articulated), and more than a hundred
extending from the knee to the ankle
muscles, tendons, and ligaments.
(called crus in Latin; the posterior of the
The joints of the foot are the ankle and
crus is the sura).
subtalar joint and the interphalangeal
THE NUMBER OF BONES IN A HUMAN BODY.
articulations of the foot.
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62
There are 62 bones in a human leg and feet.
human foot
THE NUMBER OF BONES IN A HUMAN BODY
Photo of
19
20
THE NUMBER OF BONES IN A HUMAN BODY.
Photo of
human body
T
he skeleton of an adult human consists
and a process which typically reaches
of 206 bones. It is composed of 237
completion in the third decade of life.
bones birth, which decreases to 206
In addition,the bones of the skull and face
bones by adulthood after some bones have
are counted as separate bones, despite
fused together.[1] It consists of 80 bones
b e i n g f u s e d n a t u ra l ly. S o m e re l i a bl e
in the axial skeleton and 126 bones in the
sesamoid bones such as the pisiform are
appendicular skeleton (32 x 2 in upper
counted, while others, such as the hallux
extremities including both arms and 31 x
sesamoids, are not.
2 in lower extremities including both legs).
Individuals may have more or fewer
Many small and often variable bones, such
bones than this owing to ana tomical
as some sesamoid bones, are not included
variations. The most common variations
in this count.
include additional cervical ribs or lumbar
The figure of 206 bones is commonly
repeated, but does have some peculiarities in its method of counting. It is taken of an adult
human—the number of bones in the skeleton
changes with age, as multiple bones fuse,
vertebrae. Sesamoid bone counts also may vary among individuals.
THE NUMBER OF BONES IN A HUMAN BODY
20 6
There are 206 bones in a human body
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INDEX THE NUMBER OF BONES OF HUMAN BODY
A
E
auditory (ear) bones 04
ethmoid bones 05
attachment 08
essentially 11
abdomen 08 articulating 10 axis 10 anatomical 21 adulthood 21
C
elbow 13 equina 15 enclosed 17 extremities 20
cranial bones 05
H hyoid bone 05
C-shaped 09
human ribs 09
characteristic 11
head rests 11
correspond 10
humerus 12
coccyx 10
THE NUMBER OF BONES IN A HUMAN BODY.
carpal 13
22
B
F
bones 04
Further 06
backbone 10
fingers 12
D
femurs 17
L
dorsal vertebrae 06
lacrimal 05
decrease 09
lie caudal 07
distinguish 08
lungs 08
diaphragm connects 08
lumbar spine 11
despite 20
M
S
minor 10
spine 10
metacarpal 12
sacrum 10
medulla spinalis 15 mammals 14
P
scapula 12 skeleton 21
U
parieta 04
ulna 12
palate bones 04
upper extremities 20
phalanges 12 proximity 14 pisiform 20 peculiarities 20
N
T
nasal 05
temporal 05
notochord 11
turbinate 04
R
thoracic cavity 09 thoraic 10
V viscerocranium 04
radius 12
vomer 05
rectum 16
vertebral column 11
THE NUMBER OF BONES IN A HUMAN BODY
ribcage 08
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