A group of similar cells specialized to perform specific functions
Which of these have least number of movable joints
Skull contain least number of movable joints.The bones in the skull, except the lower jaw bone, do not allow any movement and hence, has the least number of movable joints.
The total number of bones in the human skeleton are
There are 206 bones in the human skeleton system in all adult human beings including:
Skull – including the jaw bone
Spine – cervical, thoracic and lumbar vertebrae, sacrum and tailbone (coccyx)
Chest – ribs and breastbone (sternum)
Arms – shoulder blade (scapula), collar bone (clavicle), humerus, radius and ulna
Hands – wrist bones (carpals), metacarpals and phalanges
Pelvis – hip bones
Legs – thigh bone (femur), kneecap (patella), shin bone (tibia) and fibula
Feet – tarsals, metatarsals and phalanges.
The joint which helps in rotating a body in all directions is called _______
Backbone consists of
Backbone of human being consists of 33 vertebra placed one over the other. These include:
i) 24 presacral vertebrae (7 cervical, 12 thoracic, and 5 lumbar) followed by the
ii) sacrum (5 fused sacral vertebrae) and the
iii) coccyx (4 frequently fused coccygeal vertebrae).
Which of the following organism do not have bone?
i) Earthworms do not have an internal skeleton as we do, and
ii) They do not have a protective hard exoskeleton as does an insect.
iii) They are flexible, long bundles of muscle, especially designed for life underground.
iv) The characteristic wriggling of earthworms is done with two kinds of muscles.
Snail moves with the help of
How many muscle works together to move a bone?
Which of the following part of body help in movement?
The parts of the body that help in movement are:
(iii) Contraction and relaxation of muscles.
Rib Cage protects