A & P

A & P

Question 1

One of the chief differences amid the lymph vessels and the blood vessels is that the blood vessels together with the entire circulatory system constitute a closed system while the lymph vessels together with the lymph system does not constitute a closed circulatory system (Földi & Strössenreuther, 2005). Another difference between the two is that the flow of blood through the blood vessels is usually uninterrupted while the flow of lymph fluid via the lymph vessel system is usually interrupted by the lymph nodes. Besides, the blood vessels carry blood while the lymph vessels transport lymph fluid (Wingerd, 2005). Despite having differences, the lymph vessels and blood vessels also have similarities. One of the similarities is that they are both involved in the transportation of fluids. Besides, the transport of lymph in the lymph vessels is fostered by similar factors, which favor the transports of blood through the blood vessels.

Question 2

The thymus gland is remarkably crucial to the immune system since it processes lymphocytes, which fight infections in the body. The gland is vital to young adults and children as it programs lymphocytes in attacking antigens such as the viruses. Therefore, the thymus gland has a chief role in nurturing the lymphocytes through secreting a hormone. Hence, lack of the thymus gland in the immune system can lead to failure of the immune system processing lymphocytes, which help in the fight of cancerous cells and viral infections (Lavini, 2008). Therefore, there will be decreased immunity, when there is a lack of the thymus gland in the immune system. Besides, lack of the thymus gland in the immune system may affect the functions of the hormonal tissues; for example, lack of the thymus gland from birth is usually associated with alterations of the adrenal gland, pituitary gland, ovaries and thyroid.

Question 3

The arteries comprise of three layers, which are Tunica Interna, Tunica Media, and Tunica Adventitia. Tunica Adventitia is the outermost layer of the arteries and has collagen fib.............