science question 10 th class
50 points
1) what is lymph and how it is different from.blood?
2) difference between arteries and veins
3 ) describe double circulation in human beings
4) give a brief description of topic transpiration
Answers
Answer:
1.lymph: it is A light yellow fluid containing lymphocyte cells which fight against infections .
while blood is a fluid and a connective tissue which transports material
2.arteries: thick walled vessels which carry blood from heart to different parts of the body.
veins: thinn walled vessels which carry blood from different parts of the body to the heart.
3. the blood flows twice through the heart ine one cycle ,it is called double circulation
4.The loss of water in vapour form mainly from the leaves is called transpiration
Answer:
Lymph :- Lymph is a clear-to-white fluid made of: White blood cells, especially lymphocytes, the cells that attack bacteria in the blood.
Blood :- Blood is a body fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells.
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 intima, the inner layer lined by a smooth tissue called endothelium.
Veins :- Veins are blood vessels that carry blood towards the heart. Most veins carry deoxygenated blood from the tissues back to the heart; exceptions are the pulmonary and umbilical veins, both of which carry oxygenated blood to the heart. In contrast to veins, arteries carry blood away from the heart.
Double Circulation :- Double circulation is the most efficient way of circulation. in humans, the four-chambered heart, arteries, veins, and capillaries all have a vital role to play. Blood gets pumped out of the heart. This blood goes to different organs and then blood again comes back to the heart.
Transpiration:- Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers. Water is necessary for plants but only a small amount of water taken up by the roots is used for growth and metabolism.