NBHS1213 – Anatomy and Physiology of Cardiovascular System

Part I / Bahagian I

Purpose

This assignment aims to enhance students’ understanding of the anatomy and physiology of cardiovascular system. It also encourages analytical thinking by examining how disturbances in circulation affect patient responses, tissue perfusion, and overall health.

Tujuan

Tugasan ini bertujuan untuk meningkatkan pemahaman pelajar tentang anatomi dan fisiologi sistem kardiovaskular. Ia juga menggalakkan pemikiran analitis dengan meneliti bagaimana gangguan dalam peredaran darah menjejaskan respons pesakit, perfusi tisu, dan kesihatan keseluruhan.

Requirement

The cardiovascular system is responsible for transporting oxygen, nutrients, hormones, and waste products throughout the body. It plays a vital role in maintaining tissue perfusion and homeostasis. Changes in blood pressure, pulse rate, skin colour, or capillary refill may indicate underlying cardiovascular disturbances.

• Discuss the anatomical structure and physiological roles of the cardiovascular system with emphasis on the heart, blood vessels, and blood circulation.
• Explain how disruption of cardiovascular function in shock affects normal body functions and patient responses. Support your discussion with examples from your clinical practice or observations.

• Bincangkan struktur anatomi dan peranan fisiologi sistem kardiovaskular dengan penekanan kepada jantung, salur darah, dan peredaran darah.
• Terangkan bagaimana gangguan fungsi kardiovaskular dalam keadaan kejutan (shock) menjejaskan fungsi normal badan dan respons pesakit. Sokong perbincangan anda dengan contoh daripada amalan atau pemerhatian klinikal anda.

Part Ii / Bahagian Ii

Discuss the following topic(s) in the forum and submit proof of your participation in the online discussions: Pregnancy involves complex hormonal changes that support fetal development and prepare the mother’s body for childbirth. Hormones such as estrogen, progesterone, human chorionic gonadotropin (hCG), and oxytocin play important roles in these processes.

• Discuss how hormonal changes during pregnancy influence maternal physiological adaptations. In your discussion, relate these changes to common signs or symptoms observed in pregnant women.
• Share one clinical observation or real-life scenario (examples from antenatal care or patient interaction) that reflects the effects of these hormonal changes.

• Bincangkan bagaimana perubahan hormon semasa kehamilan mempengaruhi penyesuaian fisiologi ibu. Dalam perbincangan anda, kaitkan perubahan ini dengan tanda atau gejala biasa yang dialami oleh wanita hamil.
• Kongsikan satu pemerhatian klinikal atau situasi sebenar (contohnya dari penjagaan antenatal atau interaksi dengan pesakit) yang menunjukkan kesan perubahan hormon ini.

Experts Answer on Analysing Anatomy and Physiology of Cardiovascular System

Anatomy and physiological roles of the cardiovascular system

The cardiovascular system comprises heart, blood vessels and the blood, and its main purpose is to transport oxygen, nutrients, hormones and waste products. The heart has four Chambers known as right atrium, right ventricle, left atrium and left ventricle. A nurse normally monitors the heart rate, blood pressure and the ECG readings in order to evaluate the overall functioning of the cardiac system especially within patients having hypertension and coronary artery disease.

The arteries are responsible for carrying oxygenated blood from the heart, and the deoxygenated blood is returned by veins. The role of capillaries is to allow the exchange of oxygen and nutrients with tissues.
The transportation of blood between the heart and the lungs is performed through pulmonary circulation, and systemic circulation is responsible for supplying oxygenated blood to body tissues.

Effects of shocks on cardiovascular function

The main cause of shock is the inadequacy of blood circulation to supply oxygen to tissues. The common causes include trauma from road accidents, severe dengue, or major blood loss after surgery.

Impact on body function

The shock has a direct impact on body function as it leads to a decline in the blood pressure level, tissue perfusion becomes poor, creates difficulty in normal functioning of the cells, and delivery of oxygen to organs is reduced.

Patient responses

In such situations, the patient may experience a rapid pulse rate, pale skin colour, clammy skin, reduced level of consciousness and low urine output. The patient with dengue shock syndrome faces plasma leakage and reduced blood volume. In such a situation, the circulation of blood along with prevention of any organ failure can be achieved through immediate IV fluid management.

Hormonal changes during pregnancy

The hormonal changes during pregnancy are crucial as they support the fetal growth and mother in the process of childbirth. The role of estrogen is to increase the flow of blood to the uterus, and also contribute toward breast enlargement. Progesterone contributes towards relaxing uterine muscles and also supports pregnancy maintenance. The human chorionic gonadotropin helps in maintaining early pregnancy, and it is responsible for morning sicknesses faced by mothers. Oxytocin is responsible for the contraction of the uterus during labour and it also assists in ejecting milk after childbirth.

Maternal physiological adaptations

The hormonal changes lead to an increase in the heart rate, weight gain, breast development, frequent urination and changes of mode on a frequent basis.

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