(d) Hyaline Cartilage forms the 'cushions' or 'pads' upon the articular surfaces at the joints of long bones and called 'articular cartilage'.
Its role in adult body is to withstand forces of compression and torsion at the joints.
(c) All mammals have 7 cervical vertebrae in their neck (it is one of the unique mammalian characters).
Though they become long in camel & giraffe but the number is 7 only.
As whale is also a mammal it also possess the same number of cervical vertebrae.
(d) A deltoid ridge is present along the ventral side of humerus (bone of upper arm - Brachium) which provides the attachement points to muscles.
(b) Long bones gives us support as well as their bone marrow (the peripheral part) synthesizes (in adults) the blood cells.
(a) Glenoid cavity is a shallow concavity on the lateral side of pectoral girdle in which the head of humerus fits making the shoulder joint.
(d) In a human body, there are two pairs of floating ribs. i.e., and pairs.
These ribs are not attached to either the sternum or the cartilage of another rib.
They protect the kidneys.
(b) A skeletal muscle consists of a bundle of long fibres running the length of the muscle.
Each fibre is a single cell with many nuclei.
Skeletal muscle is also called striated muscle because the regular arrangement of the myofilaments creates repeating pattern of light and dark bands.
Each repeating unit is a sarcomere, the basic functional unit of the muscle.
The borders of the sarcomere are the lines, which line up in adjacent myofibrils and contribute to striations visible with a light microscope.
(a) Lower jaw is made of mandible or jaw bone.
The mandible is the largest bone in the human skull.
It holds the lower teeth in place; it assists in mastication and forms the lower jawline.
The mandible is composed of the body and the ramus and is located inferior to the maxilla.
The body is a horizontally curved portion that creates the lower jawline.
(d) Atlas is the first cervical vertebra.
Coracoid is part of the pectoral girdle.
Pterygoid is a small bone articulated with palatine.
Arytenoids are cartilage present at the back of larynx.
(c) In angular joint articulating surface of one bone is oval and convex whereas that of the other is elliptical and concave, it allows movement only in two directions e.g.
Wrist.
Fibrous joints are unmovable joints e.g.
Sutures of skull.
Cartilaginous joints have little motility due to disc of fibrocartilage between the articular ends.
In gliding joints articulate end of both the bones are either flat or curved to allow gliding movements. e.g. between carpels and wrist.
