Question

2. Given alongside is a portion
from the human body
showing some important
structure in ventral (front)
view.
(a) Where is this portion
located in the body?
(b) Name the structures
numbered 1-3.
(c) State one main function of
each of the structures named
above.
(d) Is there any duct to carry the secretions from the
structure numbered 2? If so, give its name.
​

Answer 1

(a) This portion is located in the neck region above the sternum. (b) 1- Larynx, 2 - Thyroid gland, 3 - Trachea (c) Larynx is the voice box containing vocal cords. It helps in producing sound. Thyroid gland produces thyroxine and calcitonin which are essential hormones. Trachea is the wind pipe that helps in passing air to and from the respiratory system while breathing. (d) Structure 2 is the thyroid gland. It is an endocrine gland, so it is ductless and pours its secretions directly into the blood. Hence, there is no duct.