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Courses Name: Introduction to Anatomy and Physiology BIOL102

yeeees .. For HUMAN CIRCULATORY SYSTEM

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Q) Choose any system of the human body and prepare a response to the following questions in 1-2 pages:

1. Introduction(Explain the system with the components)
2. Body(Explain how the system relates to achieve homeostasis in human body)
3. Conclusion( Choose any disease common in KSA and explain how and which part of the system is affected)

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My answer

HUMAN CIRCULATORY SYSTEM

Human circulatory system is responsible for flow of blood , nutrients , oxygen and other gases , hormones and drugs to and from cells . It consist of heart , blood , lungs, arteries , veins , capillary , coronary and portal vessels.

Heart: It is a muscular organ and is located behind and slightly left of breast bone of rib cage . It contains four Chambers , two atria and two ventricles. It pumps blood through the network of arteries and veins called the cardiovascular system.

Lungs: pulmonary arteries carry deoxygenated blood to the lungs , where carbon dioxide is released and oxygen picked up during respiration.

Veins: They carry deoxygenated blood from all parts of body to heart .

Arteries: They carry oxygenated blood from heart to all parts of body.

Portal vessels: carry blood from gastrointestinal tract , gall bladder , pancreas and spleen to liver.

Coronary vessels: coronary arteries supply oxygenated blood to the heart muscle . Coronary veins drain deoxygenated blood from it.

Capillary : They carry blood between arterioles and venules.

Blood: It is a body fluid that delivers necessary substances such as nutrients and oxygen to cells and transport metabolic waste away from cells.

Parasympathetic and sympathetic system control heart rate . Through these system body reacts to it's internal and external environments to change heart rate and maintain homeostasis .For instance take the case , when a person starts to exercise , body stops parasympathetic stimulation of heart , so the rate can increase , bring more oxygen and nutrients to muscles. As the exercise rate increases sympathetic system begin sending signals to the heart to raise rate even more. As a measure of maintaining homoeostasis increased rate of waste products are removed.

Respiratory diseases are one of the major diseases found in the inhabitants of Saudi Arabia. Asthma, lung cancer , tuberculosis ,chronic obstructive pulmonary disease are prevalent. Cardio vascular diseases like hyper tension and fluctuation in blood pressure are also prevalent.

The human lungs can function satisfactorily up to a limit where the pressure difference between the outside and inside of the lungs is 1/19 of an atmosphere. If a diver uses a snorkel for breathing, how far below the water can she swim? Assume the diver is in salt water whose density is 1044 kg/m3.

In economics, an externality is an effect from one activity which has consequences for another activity but is not reflected in prices or costs. Provide an example of an activity you are aware of that has resulted in an external cost to the environment and/or human health.  

Bonus: Explain how you would address the external cost you have identified.  

Why is Veblen described as an “Institutional Economist”? In what sense is his theory of the leisure class with its emphasis on conspicuous consumption an economic theory of human behavior that focuses on consumers as social beings in contrast with the neoclassical theory of consumer behavior that focuses on consumers as autonomous individual utility maximizers? try to be as detailed as possible.

Some of the most serious abuses taking place in developing countries deal with child labor, human slavery, sweatshops, bad governance, and environmental degradation. Select one (1) developing country, and examine the extent to which two (2) of these five (5) issues are occurring. Support your response with specific examples.

How does the use of safe and predictable routines contribute to a person’s sense of security?

Give one example of when mandatory reporting is required.

What should you do if something is outside your scope of knowledge, skills or work role?

What is meant by discrimination?

Give two examples of human rights.

What is meant by essentiality of plant nutrients? What is the difference between an essential element and a beneficial element? Describe the steps you would go through in order to determine the essentiality or non-essentiality of an element for a higher plant.

Can a plant nutritionist contribute to preventing malnutrition in human beings? Explain this statement with examples.                                   

Pick 5 words out of the following list and use them in a paragraph which correctly describes something around immunity of the human body. You can change the tense of the words if it fits better into your paragraph.

complement, phagocytosis, opportunistic, mucus, epitope, host, cytokine, macrophage, microbiome, barrier, memory