CELLS 4.1 Organ/Tissue Systems- Pre AP Biology Study Notes - New Syllabus.
CELLS 4.1 Organ/Tissue Systems- Pre AP Biology Study Notes
CELLS 4.1 Organ/Tissue Systems- Pre AP Biology Study Notes – New Syllabus.
LEARNING OBJECTIVE
CELLS 4.1(a) Describe how organ systems work together to maintain homeostasis.
CELLS 4.1(b) Predict the consequence of a disruption in homeostasis.
Key Concepts:
- CELLS 4.1.1 Multicellular organisms rely on tissues and organ systems to transport nutrients and waste in order to maintain dynamic homeostasis.
a. Animals have organ systems that work together to transport nutrients and excrete waste.
1. The digestive system is needed to derive nutrients and basic building blocks (monomers) from food, which are required for cellular function and growth.
2. The respiratory system is needed for gas exchange to obtain oxygen and remove carbon dioxide.
3. The circulatory system is needed to transport oxygen and nutrients to cells.
4. The excretory system is needed to remove toxins and nitrogenous wastes from the body and to maintain water balance with the help of the circulatory system.
b. Plants have specialized vascular tissues and cells that transport nutrients, water, and waste.
1. Plants depend on xylem to transport water and nutrients for photosynthesis from the roots to the leaves and on phloem to transport sugars from the leaves to the rest of the plant.
2. Plants excrete waste products from photosynthesis through the stomata in their leaves.