Levels of Organisation (5)
1) Cell
2) Tissue
3) Organ
4) System
5) Organism
Main organ systems in the human body (11)
- endocrine system
- respiratory system
- muscular system
- reproductive system ( male & female)
- lymphatic system
- nervous system
- blood circulatory system
- digestive system
- urinary system
- skeletal system
- integumentary system
Endocrine system structure (1) & main function (1)
- endocrine gland that secrets hormones
- coordinates body activities with the nervous system
Respiratory system structure (4) & main function (1)
- trachea
- nose
- lungs
- diaphragm
- exchange of O2 & CO2 gases between body & external environment
Muscular system structure (3) & main function (1)
- skeletal muscles
- smooth muscles
- cardiac muscles
- contracts & relaxes to produce movements in different parts of the body
Male reproductive system structure (3) & main function (1)
- testes
- prostate glands
- penis
- produce sperm & male sex hormones
Female reproductive system structure (5) & main function (1)
- ovary
- uterus
- fallopian tube
- vagina
- cervix
- produce ovum & female sex hormones
Lymphatic system structure (3) & main function (2)
- spleen
- lymph nodes
- lymph vessels
- maintains bodily fluids
- prevents infectious diseases
Nervous system structure (3) & main function (2)
- brain
- spinal cord
- peripheral nerves
- detects & sends information in the body
- coordinates body activities
Blood circulatory system structure (4) & main function (1)
- heart
- artery
- vein
- blood capillary
- transports nutrients, respiratory gases & waste products
Digestive system structure (7) & main function (1)
- mouth
- oesophagus
- stomach
- liver
- pancreas
- small intestine
- large intestine
- digests food into a simple form for easy absorption
Urinary system structure (4) & main function (1)
- kidney
- ureter
- urethra
- bladder
- eliminates waste products ( urea, uric acid) from body
Skeletal system structure (4) & main function (3)
- bone
- cartilage
- ligament
- tendon
- supports the body
- protects the internal organs
- provides a base for muscle adhesion
Integumentary system structure (1) & main function (1)
- skin
- protects the body from physical injury, infection & dehydration
Main systems in plants (2)
- shoot system
- root system
Shoot system structure (5) & functions (2)
- stems
- leaves
- shoots
- flowers
- fruits
- stem & twigs: supports leaf at vertical position for max sunlight absorption during photosynthesis
- flowers: pollination process
Root system structure (1) & functions (2)
- all roots in a plant
- absorb water & mineral salts
- provide support for plants
