Question

Ques:-DRAW A DIAGRAM OF NEURON.
EXPLAIN NEURON.

Ques:-DRAW A DIAGRAM OF SKELETON.
EXPLAIN SKELETON.

JOINTS:-
Q. EXPLAIN BALL SOCKET JOINT.
Q. EXPLAIN PIVOTAL JOINT .
Q. EXPLAIN HINGE JOINT.
Q. EXPLAIN FIXED JOINT.


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Answer 1

1.The neuron is the basic working unit of the brain, a specialized cell designed to transmit information to other nerve cells, muscle, or gland cells. Neurons are cells within the nervous system that transmit information to other nerve cells, muscle, or gland cells. Most neurons have a cell body, an axon, and dendrites.

2.the structure formed by all the bones in a human or animal body

3(.A)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.

(b)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.

(c)A hinge joint is a type of synovial joint that exists in the body and serves to allow motion primarily in one plane. [1] The hinge joint is made up of two or more bones with articular surfaces that are covered by hyaline cartilage and lubricated by synovial fluid.

(d)Joints hold your bones together and allow your rigid skeleton to move. Fixed joints. Some of your joints, like those in your skull, are fixed and don't allow any movement. The bones in your skull are held together with fibrous connective tissue. Slightly movable joints.

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Answer 2

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1)Neuron comprises of dendrite, axon and cell body. Dendrites receives messages from the surrounding and sends it to the cell body. Cell body consists of nucleus, mitochondria and other organelles. Axon transmits the message away from the cell body and pass it to the the next receiving neuron.

Joints:-

1)Ball and Socket joints have an angular movement in all directions and a pivot movement. Examples : Shoulder joint, Hip joints etc.

2)Pivot joints allow rotation, and although you have many joints in your body, there are only three pivot joints. They are located in your neck, your wrist, and your elbow.

3)Hinge joints are a type of joint that functions much like the hinge on a door, allowing bones to move in one direction back and forth with limited motion along other planes.