Skeletal and Muscular System

Running along the length and present in the wall of bone, there are a number of longitudinal canals called the Haversian canals, which are interconnected by a number of small transverse and oblique canals called Volkmann's canals.

Parasphenoid bone is a flattened and inverted T-shaped bone, which forms the floor of cranium.

In hinge joint, the convex surface of one bone fits into the concave surface of another bone, e.g. knee, elbow and interphalangeal joints.

A transverse ligament is found in atlas. It divides the neural foramen of atlas into a smaller anterior (front) odontoid fossa and a posterior, larger vertebral foramen.

Osteoporosis is a disease, in which bones loses minerals and fibres from its matrix. Imbalances of hormones like calcitonin, parathyroid and sex hormones, deficiencies of calcium and vitamin-D are the main causes of osteoporosis.

Each arm consists of 30 bones, one humerus, one radius, one ulna, eight carpal bones, five metacarpal bones and fourteen phalanges bones, i.e. 1 + 1 + 1 + 8 + 5 + 14 = 30.

Synovial fluid is present in perfectly movable joints. The synovial membrane secretes synovial fluid, which lubricates and provides nourishment to articular cartilage.

Axis is the second cervical vertebra, which is identified by a prominent odontoid process. The odontoid process of axis vertebra fits in the odontoid fossa of first cervical vertebra, forming the actual pivot joint at which the skull rotates around together with the atlas.

A fracture of the distal end of radius in which the distal fragment is displaced posteriorly is called Colles’ fracture.

X-ray is the technique by which one can observe the shape and structure of the bones whereas ECG checks the functioning of heart and blood test to check the level or the components of the blood.

If we touch our back below the neck in the middle, then we can feel a hard bony structure known as back bone. It helps to maintain the erect posture of body.

There are different joints present is our body allowing a particular range of movemen |||| |---|---|---| |

So, it is the neck gliding joint which is a mismatched pair.

Birds are the living organisms which can fly in air and walk on the ground. The bones of the bird limbs are typical for walking and perching, and the bony parts of forelimbs are modified into wings.

 Blood, bones and cartilage are examples of connective tissue.Connective tissue is one of the four types of biological tissue that supports, connects, or separates different types of tissues and organs in the body. The other three types are epithelial, muscle, and nervous tissue.

Tendons and ligaments belong to connective tissues. Ligaments connect two or more bones together and help stabilize joints. Tendons attach muscle to bone. Tendons vary in size and are somewhat elastic and attach bones to muscles.