2.4 Levels of Organisation

Question 1

Organisation

Answer 1

Cell 🠮 Tissue 🠮 Organ 🠮 System 🠮 Organism

Question 2

Main systems in the human body:
Functions and Organs Involved:

1. Endocrine system
2. Respiratory system
3. Muscular system
4. Male reproductive system
5. Female reproductive system
6. Lymphatic system
7. Nervous system
8. Blood circulatory system
9. Digestive system
10. Urinary system
11. Skeletal system
12. Integumentary system

Answer 2

1. The endocrine gland secretes hormones
   ⇒ Coordinates body activities with the nervous system
2. Trachea, nose, lungs and diaphragm
   ⇒ Exchange of oxygen and carbon dioxide gases between the body and the external environment
3. Skeletal muscles, smooth muscles and cardiac muscles
   ⇒ Contracts and relaxes to produce movements in different parts of the body
4. Testes, prostate gland and penis
   ⇒ Produces sperm and male sex hormones
5. Ovary, uterus, Fallopian tube, vagina and cervix
   ⇒ Produces ovum and female sex hormones
6. Spleen, lymph nodes and lymph vessels.
   ⇒ Maintains balance of bodily fluids and prevents infectious diseases
7. Brain, spinal cord and peripheral nerves
   ⇒ Detects and send information in the body, as well as coordinates body activities
8. Heart, artery, vein and blood capillary
   ⇒ Transports nutrients, respiratory gases and waste products
9. Mouth, oesophagus, stomach, liver, pancreas, small intestine and large intestine
   ⇒ Digests food into a simpler form for easy absorption
10. Kidney, ureter, urethra and bladder
    ⇒ Eliminates waste products such as urea and uric acid from the body
11. Bone, cartilage, ligament and tendon
    ⇒ Supports the body, protects the internal organs and provides a base for muscle adhesion
12. Skin
    ⇒ Protects the body from physical injuries

Question 3

Main systems in plants:

Answer 3

The plant system is divided into:
shoot system ⮞ stems, leaves, shoots, flowers and fruits
⮞Stems and twigs are support systems that support the leaves at the vertical position to allow maximum absorption
of sunlight during photosynthesis

root system ⮞ all roots in a plant that function in absorbing water and mineral salts as well as providing support for plants