Biological Hierarchy/ Animal Tissues Flashcards
Biological Hierarchy
Cells, Tissues, Organs, and Organ Systems
Biological hierarchy from the cell to the organ systems
- Organisms in the plant and animal world are multicellular
- The cell is the smallest unit of life
- When a group of the same kind of cells are put together so that they perform a task, you get a tissue
Organ
When a group of the same kind of tissues
gather together to perform a particular
function in a larger organism, the tissue
becomes an organ
Organ System
Organs cannot function alone; they act in
tandem with other similar organs to form
an organ system
4 main types of tissues found in animals
- Epithelial Tissues
- Connective Tissue
- Muscle Tissue
- Nervous Tissue
Tissue
Groups of cells that function together to perform specialized tasks
are called tissues
In animals, cells specialize to form 4 types of tissues
The cells in each tissue work together to accomplish important
tasks
Epithelial Tissue
Cells that are packed together to form many layers.
- Epithelial tissue can be used to line, support/protect, or to
cover your body.
Connective Tissue
Connects different tissues together:
Connective Tissue: Tendons
Connects muscle to bone
Connective Tissue: Ligaments
Connects bone to bone
Connective Tissue: Cartilage
Covers bones, so that the bones don’t rub over each other directly
Blood
A complex liquid containing (among many
things): Red blood cells, white blood cells, plasma and platelets.
Red Blood Cells
Contain large molecules called
hemoglobin, which carries oxygen to tissues.
White Blood Cells
Fight off infection and disease
Platelets
Responsible for clotting if there is a cut
