This is the part-2 of the ch-6 Science Class 10 CBSE For more detailed explanation watch the video on my channel! https://youtu.be/-3gKzgTNwrg

1. RESPIRATION IN
PLANTS

2. Gaseous exchange occurs in plants through: -
-Stomata in leaves
- Lenticels in stem
- Surface of roots
During respiration plants absorbs Oxygen and use the glucose
to create Carbon Dioxide, Water and Energy
Glucose + Oxygen Carbon Dioxide + Water + Energy

3. TRANSPORTATION
 Transportation in Humans
• Blood is a connective tissue.
• It transports necessary substances to cell and transport metabolic waste product away from those same cells.
• Main components of Blood:
Plasma- It is a yellow colour fluid. It transports food, carbon dioxide and waste products.
RBC- Contains Haemoglobin which transports Oxygen.
Platelets- It helps in clotting of blood.
WBC- It fights against harmful bacteria, viruses and germs.
• The heart pumps the blood through the blood vessels.

4. HEART
• It is a muscular organ.
• It has two sides separated by muscular wall.
• Four Chambers- Left atrium, Right atrium,
Left ventricle, Right ventricle.

5. HOW DOES THE
HEART WORK?
• De- oxygenated blood comes from body to Right Atrium.
• Which then pumps into the lung by Right Ventricle through
arteries.
• Where it drops Carbon dioxide and carries Oxygen.
• The oxygenated blood comes to the Left Atrium through
veins, which then pumps to the body parts by Left Ventricle
through Aorta.

6. HOW DOES THE
HEART WORK?

7. BLOOD VESSELS
 Arteries
• Carry's oxygenated blood
• From heart to body parts except the pulmonary arteries.
• Thick and elastic.
• Smallest vessels which are one cell thick are called capillaries.
 Veins
• Carry deoxygenated blood
• From body parts to heart except pulmonary veins.
 Lymph
• Also a transporter fluid.
• The pores in the walls of capillaries, some amount of plasma, proteins and blood cells escape intercellular spaces in the
tissues to form lymph.
• Drains away the excess tissue metabolism.
• Absorbs and transports fat from intestine.
• It is colourless.

8. TRASPORTATION
 Transportation in plants

9. EXCRETION
• Process in which wastes are removes from our body.
• Removes metabolic waste.
• Metabolic waste:
-Digestive waste
-Respiratory waste
- Nitrogenous waste

10. HUMAN EXCRETORY
SYSTEM
• It consists of Two kidneys, Ureters, Urinary bladder and Urethra.
• Kidneys- Filter blood and remove waste.
• Ureters- Drain out urine from kidney to urinary bladder.
• Urinary Bladder- Stores the urine.
• Urethra- Transmit urine outside the body.
• Kidneys have millions of filtration units called Nephrons.
 Nephrons
• Filtration units in kidneys.
• Consists of a tube which is connected to duct and a cup shaped structure that is
Bowman’s capsule.
• Bowman’s capsule- It filters blood to collect urine.
• Henle’s loop- Reabsorption of glucose, amino acid and water.

11. • Then urine enters into ureter through the duct and
gets collected in the urinary bladder.

12. EXCRETION IN PLANTS
• Plants remove oxygen through stomata.
• Excess water is removed though stomata by transpiration.
• Plants also loose some old leaves and barks.
• Other plant waste include resins, saps, latex.

13. Thank you!