Question

Q- Answer the followingquestions in brief:


(i) Name all the parts of skeletal system..

(ii) From how many bones the skull is made of ??

(iii) Define them:
▪︎ Cartilage
▪︎ Ligaments
▪︎ Bone marrow

(iv) Name the main four parts of the skeletal system.. Also define them...

(v) What is the function of the following in our eye...
• Cornea
• Pupil
• Lens
• Iris
• Retina
• Optic nerve...




Anyone please tell it now bcs tomorrow is my exam I am revising the topics... please help...​

Answer 1

ii) it consists of 14 individual bones

Answer 2

1. Besides bones, the skeletal system includes cartilage and ligaments. The skeleton is traditionally divided into two major parts: the axial skeleton, which includes the skull, spine, and rib cage; and the appendicular skeleton, which includes the appendages and the girdles that attach them to the axial skeleton.
2. There are 22 bones in the skull. Including the hyoid and the bones of the middle ear, the head contains 29 bones.
3. Cartilage is a tough but flexible tissue that is the main type of connective tissue in the body. Around 65–80% of cartilage is water, although that decreases in older people, and the rest is a gel-like substance called the 'matrix' that gives it its form and function.A ligament is a fibrous connective tissue which attaches bone to bone, and usually serves to hold structures together and keep them stable.The soft, sponge-like tissue in the center of most bones. It produces white blood cells, red blood cells, and platelets. Enlarge. Anatomy of the bone.
4. The skeletal system includes four basic components, although some sources include a fifth, the joints. The four are the bones, which make up most of the mass of the skeletal system; cartilage, which acts mainly as padding; ligaments, which usually connect bones to bones; and tendons, which join muscles to bones.

   5.  a. Cornea: It is the fromt part of the eye. The light coming from objects              enters the eye through cornea.    

       b. Iris: It controls the amount of light entering the eye.

      c. Pupil: It controls the illumination in the eye.  

       d. Ciliary muscles: The focal length of the eye-lens can be changed by     changing its shape by the action of ciliary muscles.

    e. Eye-lens: It focuses light on to the retina.  

      f. Retina: It is a delicate membrane having a large number of light- sensitive cells called 'rods' and 'cones' which respond to the intensity of light and colour of objects respectively.

       g. Optic nerve: It conveys the image formed on the retina to the br

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