Question

Match the terms with their definitions. 1. Spine 2. Fovea 3. Sinus 5. Meatus 6. Head 7. Trochanter Tubelike opening Tiny pit or depression Small, knoblike projection Thornlike projection Rounded enlargement at end of bone Air-filled cavity within the bone

Answer 1

1) Spine: It is a thornlike projection, made up of 33 individual bones. It supports the body allowing movements such as standing upright, bending and twisting. It protects the spinal cord against damage. In adult, spine is an S shaped curve that can absorb shock and maintain balance.

2) Fovea: A tiny pit/depression that is present in the retinal macula is the Fovea. The cells provide the clearest images. This is because layers of the retina in Fovea spread aside and allow light fall directly on the cones. Cones are light perceiving cells that convert light to neural signals that can be picked up by nervous system. Most of the cones (Around 6 million of them) are concentrated near or around the Fovea.

3) Sinus: Sinus is a hollow air filled cavity in the skull lined with soft mucosal tissue. It normally contains as thin layer of mucus and filled with air. The cells have tiny cilia on their surface. The cilia trap the bacteria and pollutants out of the body, thereby preventing against bacterial and other infections. Blockage of sinuses is very painful.

4) Tubercle: A small knob like projection, mostly on a bone. It helps in attachment of a tendon or ligament. The upper arm humerus has a greater tubercle and the lesser tubercle. It attaches connective tissue and form articular surfaces.

5) Meatus: Meatus is a tube like opening that extends within a bone. It a channel passing through the bone. The temporal bone has an external auditory meatus. This meatus forms a part of the skull that leads to the ear. It leads from outer ear to the ear drum.

6) Head: Head is the rounded projection that is a part of the joint. It separates from the shaft of the same bone via the neck, a narrow portion. The Femur bone has a head at the top of it.

7) Trochanter: Trochanter is a large bump like projection that attaches connective tissue. Trochanter attaches the hip and thigh muscles. The femur bone has a greater Trochanter at its top. The greater trochanter attaches muscles such as the gluteus medius and minimus, piriformis, obturator internus etc. There is a lesser Trochanter too that receives attachment of several muscle like psoas major and ilacus muscles.

Right Choice:

1. Spine: Thornlike projection

2) Fovea: Tiny pit/depression

3) Sinus: Airfilled cavity within a bone

4) Tubercle: Small, Knoblike projection

5) Meatus: Tubelike opening

6) Head: rounded enlargement at end of bone

7) Trochanter: Relatively large process