Question

d. Cellular respunt
1. Answer the following questions.
a. Define external respiration and internal respirations?
b What are differences between aerobic and anaerobic respiration ?
c. Sketch a neat and labeled diagram of human respiratory system and human
urinary system
d. What is digestion ? How does it occur in amoeba?
e. What is digestive system ? Sketch neat and labelled diagram of human
digestive system.
f. Make lists of respiratory organs and excretory organs.
g. Describe briefly digestion of food in human body with suitable diagram.
h. Describe briefly respiration process in human being.
Describe in short about urinary system of human being.
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Answer 1

--Sketch a neat and labeled diagram of human respiratory system and human

1. Define external respiration and internal respirations

ans==External respiration occurs in the lungs where oxygen diffuses into the blood and carbon dioxide diffuses into the alveolar air. Internal respiration occurs in the metabolizing tissues, where oxygen diffuses out of the blood and carbon dioxide diffuses out of the cell

• 2. What are differences between aerobic and anaerobic respiration ?
• ans---Aerobic Respiration — Takes place in the presence of oxygen. Anaerobic Respiration –Takes place in the absence of oxygen

4 What is digestion ? How does it occur in amoeba

• Digestion is the breakdown of large insolubleThe digestive system is made up of organs that are important for digesting food and liquids. These include the mouth, pharynx (throat), esophagus, stomach, small intestine, large intestine, rectum, and anus. food molecules into small water-soluble food molecules so that they can be absorbed into the watery blood plasma. In certain organisms, these smaller substances are absorbed through the small intestine into the blood stream
• The food is digested in the food vacuole with the help of enzymes. Absorption: It is then absorbed in the cytoplasm of the Amoeba by diffusion. Assimilation: The absorbed food provides energy and a part of nutrition is used for growth.
• 5 What is digestive system ? Sketch neat and labelled diagram of human digestive system
• .The digestive system is made up of the digestive tract and other organs that help the body break down and absorb food. It is a long, twisting tube that starts at the mouth and goes through the oesophagus, stomach, small intestine, large intestine and anus

• 6Make lists of respiratory organs and excretory organs
• respiratory organs

1. Nose.
2. Mouth.
3. Throat (pharynx)
4. Voice box (larynx)
5. Windpipe (trachea)
6. Large airways (bronchi)
7. Small airways (bronchioles)
8. Lungs.

• excretory organs

1. kidneys,
2. ureter,
3. urethra,
4. urinary
5. bladder,
6. skin,
7. liver
8. , intestine
9. lungs.