Tissues Flashcards
What is the organisational hierarchy?
- atoms
- molecules
- cells
- tissues
- organs
- organ systems
- organisms
What do organs do?
Work together to coordinate activities and achieve a common function
What is an organ
Two or more tissues, that together perform a specialised function
What is an example of main tissue?
Cardiac muscle
Give 2 examples of sporadic tissue
Blood vessels
Nerves
What do multicellular organisms require to function?
Sophisticated organ systems
How to organs help maintain homeostasis?
Through integration of systems
How many organ systems are there?
11
What are tissues?
A group of cells specialised for a particular function
What are cells often separated by?
Matrix - non living, intracellular material produced by cells
What is the name given to the study of tissues?
Histology
What are the 4 main types of tissues?
- Connective tissue
- Epithelial tissue
- Muscle tissue
- Nervous tissue
What are the functions of connective tissue (5)?
Protection
Support and binding
Energy storage
Transport
Immunity
What are the functions of epithelial tissue (5)?
Protection
Lining
Filtration
Absorption
Secretion
What are the functions of muscle tissues (3)?
Locomotion (movement)
Moving food
Beating heart
What are the functions of nervous tissue (3)?
Transmission of impulses for communication
Coordination
Control
What are the 2 components of connective tissue?
Cells & Extracellular matrix
What are the different types of connective tissue dependant on?
The abundance and type of both the:
- extracellular matrix
- cells
What are connective tissue involved in?
- packaging and dividing
- providing support
- energy storage
- space filling
What are deep tissues?
Tissues that are never exposed to environment outside the body
What do cartilage tissue do?
Support and bind other tissues
What do fat tissues do?
Store nutritional substances
What does the extracellular matric of connective tissue do?
Produce protective and regulatory substances
Which type of tissue is most diverse?
Connective tissue
Eg. Bone, blood fay etc
What are the 3 basic component of connective tissue?
- Specialised cells
- Protein fibres
- Ground substances
Give two examples of specialised cells in the connective tissue
- Fibroblasts
- Osteocytes
What is an example of protein fibres within connective tissue?
Collagen
What is ground substance of connective tissue? Function?
A clear colourless fluid
It fills all spaces between cells
What are the 3 types of connective tissue?
- Connective tissue proper
- Fluid connective tissues
- Supporting connective tissue
What are the 2 types of ‘connective tissue proper’?
Loose - fibres create loose, open framework
Dense - fibres densely packed
What are the two types of ‘fluid connective tissue’?
Blood - in circulatory system
Lymph - in lymphatic system
What are the two types of ‘supporting connective tissues’?
Cartilage - solid, rubbery matrix
Bone - solid, crystalline matrix
What are the 5 support cells?
- Fibroblasts
- Microfibroblasts
- Osteocytes
- Chondrocytes
- Adipocytes
What
What makes up the largest volume of connective tissue?
The ground substance
Matrix =
Ground substance + fibres
Give 3 examples of connective tissue fibres
- Collagen
- Reticular
- Elastic
