Question
22. boold ent ni noiteithsonoo nilueni edil esessipeb nellew onimmiwe The heart is part of the circulatory system. (a) (i) Name one substance transported by the blood in the circulatory system. __ dosmote (ii) What is the main type of tissue in the heart wall? __ (1) (1)
Answer
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Tegan
Elite · Tutor for 8 years
Answer
Oxygen/Nutrients/Waste products/Hormones (ii) The main type of tissue in the heart wall is:【Explanation】: The heart wall predominantly consists of Cardiac Muscle Tissue. This particular tissue facilitates the contraction and expansion of the heart, aiding with the movement of the blood throughout the body.【Answer】: Cardiac Muscle Tissue(iii) The heart pumps blood through the body in the outlined systematic way:【Explanation】 First, deoxygenated blood flows into the right atrium from the body through the vena cava. It then proceeds to the right ventricle which sends it to the lungs for oxygenation via the pulmonary artery. Oxygen-rich blood returns to the heart from the lungs entering the left atrium via the pulmonary veins. This oxygen-filled blood then goes to the left ventricle from where it is dispatched around the whole body through the aorta. Blood thus circulates around the body because of the robust contraction and relaxation movements cardiac muscles which make up the heart.【Answer】: Deoxygenated blood from the body enters right atrium -> then to Right ventricle -> Pulmonary artery transports it to lungs for oxygenation -> Oxygen filled blood returns to heart entering the left atrium through pulmonary veins -> then proceeds to Left Ventricle -> finally dispatched to circulate around the body through Aorta.
Explanation
Oxygen, nutrients from digested food, waste products for excretion, hormones and other chemicals that control and coordinate body functions. These are just examples, hence many other answers would also fit.