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Answer:
1. Arteries: Any of the muscular walled tubes forming part of the circulation system by which oxygenated blood is conveyed from the heart to all parts of the body is called arteries.
2. Xylem: The vascular tissues in plants which conduct water and dissolved nutrients upwards from the root and also helps to form the woody element in the stem.
que.2: Skin is considered as excretory organ because it excretes water, salt and urea from the body through sweat.
Q1-i
Arteries
The arteries are the blood vessels that deliver oxygen-rich blood from the heart to the tissues of the body. Each artery is a muscular tube lined by smooth tissue and has three layers: ... The media, a layer of muscle that lets arteries handle the high pressures from the heart.
ii) Xylem
Xylem is a plant vascular tissue that conveys water and dissolved minerals from the roots to the rest of the plant and also provides physical support. Xylem tissue consists of a variety of specialized, water-conducting cells known as tracheary elements.
Q2 -Is skin also considered as an excretory organ?
Skin is also considered as a excretory organ because Skin excretes salt, and urea from the body through sweat.
Q3-Give one function of each of the following organs:-
i-) It deliver blood to the organs and tissues in your body.
ii-) Kidney removes fluid wastes from our body. It also purifies the blood.
iii-) Platelets form clots over cuts and wounds to stop bleeding out of excessive blood.
Q4-What is the role of Heart? Briefly describe all the chambers of the heart.
The heart pumps blood into our body which is essential for survival of organisms.
The heart has four chambers: two atria and two ventricles.
The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle.
The right ventricle pumps the oxygen-poor blood to the lungs.
The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle.