Introduction
- Organ systems are groups of organs working together for specific functions essential for survival and proper functioning of complex animals.
Digestive
- For processing nutrition
- Converts food into usable nutrients required by the body.
- It has four stages:
- Ingestion: taking food
- Digestion: breaking down food
- Absorption: taking up nutrients
- Egestion/Elimination: removes undigested material
Circulatory
- “Transport Network”
- Transports products of digestion throughout the body.
- Delivers nutrients and oxygen in the cells throughout the body
- Removes waste products
- Key Components are:
- Heart,
- Blood Vessels,
- Blood
Respiratory
- “Energy Conversion”
- converting digested products into usable energy
- works closely with the circulatory system
- Main Functions are:
- gas exchange,
- cellular respiration
Excretory
- “Waste Management”
- Maintains body’s internal part of digestive system
- Key organs:
- Kidneys
- Bladder
- Liver
Immune
- Protects against pathogens/disease-causing agents.
- It fights against pathogens
- Key components:
- White blood cells
- Antibodies
- Lymphatic system
Pathogens and Immune Response
- foreign substances (living/non-living) that elicit a response.
- Types:
- Bacteria
- Viruses,
Endocrine System:
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produces hormones
-
can be secreted inte blood/lymph
-
transported to target cells to elicit a specific response,
-
can be rapid or slow
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hormones can have different