1. the excretory substance in fishes is
(a) Urea
b ammonia
c oxygen
(d) Carbon dioxide
2. The number of kidneys in human body is :
a 1
(b) 2
(c)3
d 4
3. Transport of food in plants takes place through?
a xylem
(b) Phloem
(c) Lenticles
d bark
4. Oxygen rich blood is carried to the heart by?
a veins
(b) Arteries
(c) Xylem
d phloem
5. Which one of the following controls blood circulation?
(a) Lungs
(b) Liver
(c) Heart
d kidneys
Very Short Answer Type Questions
1. Write the name of various types of cells found in the blood.
2. What is haemoglobin?
3. What is blood and its fluid part called?
4 Write the various types of blood vessels.
5. What is the main function of white blood cells?
6. What is transpiration?
7. What is vascular tissue? Name them.
8. What is urine? Write it's composition
Answers
Answer:
1.CO2
2.2
3.phloem
4.venis
5.heart
1-The primary excretory organ in fishes, as in other vertebrates, is the kidney. In fishes some excretion also takes place in the digestive tract, skin, and especially the gills (where ammonia is given off).
2-b
3-The food is made by the mesophyll cells of a leaf and from there it enters into the sieve tubes of the phloem. These phloem tubes are interconnected and once the food reaches the phloem tube of a leaf, it is then transported to all other parts of a plant.
4-Oxygen-rich blood flows from the lungs back into the left atrium (LA), or the left upper chamber of the heart, through four pulmonary veins. Oxygen-rich blood then flows through the mitral valve (MV) into the left ventricle (LV), or the left lower chamber.
5-c
v/s
1-They begin their life as stem cells, and they mature into three main types of cells— RBCs, WBCs, and platelets. In turn, there are three types of WBC—lymphocytes, monocytes, and granulocytes—and three main types of granulocytes (neutrophils, eosinophils, and basophils). See them in action in "Meet the blood cells
2-a red substance in the blood that carries the gas we need to live (oxygen) and contains iron
3-The liquid part, called plasma, is made of water, salts, and protein. Over half of your blood is plasma. The solid part of your blood contains red blood cells, white blood cells, and platelets. Red blood cells (RBC) deliver oxygen from your lungs to your tissues and organs.
4-There are three kinds of blood vessels: arteries, veins, and capillaries. Each of these plays a very specific role in the circulation process. Arteries carry oxygenated blood away from the heart.
5-White blood cells are also called leukocytes. They protect you against illness and disease. Think of white blood cells as your immunity cells. In a sense, they are always at war.
6-the process of water passing out from the surface of a plant or leaf
7-vascular tissue. The tissue in vascular plants that circulates fluid and nutrients. There are two kinds of vascular tissue: xylem, which conducts water and nutrients up from the roots, and phloem, which distributes food from the leaves to other parts of the plant.
8-It consists of water, urea (from amino acid metabolism), inorganic salts, creatinine, ammonia, and pigmented products of blood breakdown, one of which (urochrome) gives urine its typically yellowish colour.