Skeletal and Muscular System

Yes, last 2 pairs (eleventh and twelfth) of ribs are not connected ventrally, and are therefore, called floating ribs.

Yes, it is correct. Axial skeleton consists of 80 bones distributed along the main axis of the body. The skull is composed of two sets of bones – cranial and facial, that totals to 22 bones. Axial skeleton consists of 80 bones distributed along the main axis of the body. The skull is composed of two sets of bones – cranial and facial, that totals to 22 bones.

Yes, it is correct. Pelvic girdle consists of two coxal bones. Each coxal bone is formed by the fusion of three bones – ilium, ischium and pubis.

Tooth enamel is the hardest substance in the human body, composed primarily of hydroxyapatite crystals. It measures 5 on the Mohs scale of mineral hardness, harder than bone (which is around 3-4). Enamel protects teeth from wear and decay.

A humerus is a long bone in the arm or forelimb which extends from the shoulder to the elbow.

The wings of the birds are attached to the flight muscles.

Hinge joint is found in knee and elbow.

“Osteo/osseo” is the root word which means “bone”.

“Oss” is the root word which means “bone”.

Ball & socket joint is present between humerus bone & pectoral girdle where ball-shaped surface fits into cup-like depression of different bone.

Haversian canals are a series of microscopic tubes in the outermost region of the bone called cortical bone that allow blood vessels and nerves to travel through them. Each haversian canal generally contains one or two capillaries and nerve fibres.

The sentence requires a verb meaning 'to receive or obtain support' in present tense. 'Gets' is the only option that correctly completes the meaning: 'Our body gets its support from this strong frame made of bones called skeleton.' 'Results' doesn't make sense contextually, 'withdraws' means the opposite, and 'makes' doesn't fit the body's relationship to the skeleton.

The sentence describes where two bones come together at a joint. 'Meet' correctly captures this anatomical relationship. 'Interfere' suggests disruption, 'cover' doesn't make sense contextually, and though bones do touch, 'meet' is the more precise term for describing joint locations.

We would say "lined" because bones have cartiledge attached to them. They are not soaked in cariledge as cartiledge is no a liquid. We cannot say "done" because this implies tha bones are made up of cartiledge, which is untrue and this would also apply to "made". Hence, cartiledge is the correct answer.

There is a comparision being made between bones and steel. We would not say "as strong" because this indicates that bones are equally as strong, but this is not he case. In this case, bones are stronger than steel by a factor of 5 (i.e. 5 times). Hence, we would use the word "stronger".