pls tell answer of these key words shortly. pls
Answers
☆Backbone :-
spinal column, spine.
☆Ball and Socket Joint :-
also called spheroidal joint, in vertebrate anatomy, a joint in which the rounded surface of a bone moves within a depression on another bone, allowing greater freedom of movement than any other kind of joint.
☆Bristles :-
a short thick hair
☆Cartilage :-
Cartilage is a resilient and smooth elastic tissue, a rubber-like padding that covers and protects the ends of long bones at the joints and nerves, and is a structural component of the rib cage, the ear, the nose, the bronchial tubes, the intervertebral discs, and many other body components.
☆Cavity :-
Permanently damaged areas in teeth that develop into tiny holes.
☆Fixed Joints :-
Fixed joints permit stability to certain areas of the body, although they do not move. Examples of fixed joints include the joints between the bones in the skull and the joint where the radius and ulna bones meet in the lower arm.
☆Gait of animals :-
Gait is the pattern of movement of the limbs of animals, including humans, during locomotion over a solid substrate.
☆Hinge Joint :-
A hinge joint (ginglymus) is a bone joint in which the articular surfaces are molded to each other in such a manner as to permit motion only in one plane.
☆Muscles :-
Muscle is a soft tissue found in most animals. Muscle cells contain protein filaments of actin and myosin that slide past one another, producing a contraction that changes both the length and the shape of the cell.
☆Outer Skeleton :-
An exoskeleton is a hard external skeleton that protects the outer surface of an organism and enables movement through muscles attached on the inside.
☆Pelvic bones :-
The pelvis forms the base of the spine as well as the socket of the hip joint. The pelvic bones include the hip bones, sacrum, and coccyx. The hip bones are composed ofthree sets of bones that fuse together as we grow older.
☆Pivotal joints :-
Pivot joint, also called rotary joint, or trochoid joint, in vertebrate anatomy, a freely moveable joint (diarthrosis) that allows only rotary movement around a single axis.
☆Ribcage :-
The rib cage is the arrangement of ribs attached to the vertebral column and sternum in the thorax of most vertebrates, that encloses and protects the heart and lungs.
☆Shoulder Bones :-
The shoulder is made up of three bones: the scapula (shoulder blade), clavicle (collarbone) and humerus (upper arm bone).
☆Skeleton :-
The human skeleton is the internal framework of the human body. It is composed of around 270 bones at birth – this total decreases to around 206 bones by adulthood after some bones get fused together.
☆Streamlined :-
A streamlined body is a shape that decreases the friction drag between a fluid, such as air and water, and an object that passes through that fluid. Drag is the force which reduces the speed of the motion.