Multicellular organisms 1 Flashcards
Cell differentiation
Stem cell changes from one type to a more specialised one.
Unicellular Organisms
Consists of only one cell. Get nutrients from their environment.
Multicellular Organisms
Consist of more than one cell.
Genes
Regions of DNA molecule
Code for a particular protein molecule
Can be turned on and off
Stem Cells
Capacity to differentiate and multiply into the 200 cell types that form a human.
Blood Capillaries
Bring vital nutrients to cell
Lymph Capillaries
Collect waste products
Hierarchical Structure of Multicellular Organisms
Cells of same type, assemble together and make tissue
Different tissues assemble to perform particular task form organs
Different organs work together to form organ systems
Tissue and the types
A collection of smaller cells that carry out specific functions together.
- Connective
- Epithelial
- Muscle
- Nervous
Tissue Type - Epithelial
Tightly packed cells, acts as protective barrier
Tissue Type - Connective
Connect other tissues and organs.
RBC, WBC, Fat cells & Bone cells
Tissue Type - Muscle
Responsible for movement
3 types:
- Skeletal:
Responsible for voluntary movement - Smooth:
Responsible for involuntary movements (digestion) - Cardiac:
Responsible for pumping action of the heart
Tissue Type - Nervous
Involved in sending, receiving and processing information
Tissue (plants)
Dermal Tissue: Protective barrier
Ground Tissue: Food and energy storage
Vascular Tissue: Material transport between organs
What are organs
Groups of tissues that work together to carry out functions