Tissues, organ and organ systems Flashcards
Organs:
Contains different tissues working together to carry out a particular function
Muscular tissue:
Contracts, bringing about movement.
Used to churn the food in the contents of the stomach.
Glandular tissue:
Produces substances such as enzymes and hormones.
Epithelial tissue:
Covers some parts of the body.
Pancreas and salivary glands:
Produce digestive ‘juices’
Liver:
Produces bile.
Small intestine:
Digests and absorbs soluble food.
Large intestine:
Absorbs water from undigested food, producing faeces.
Tissue:
Consists of a group of specialised cells which carry out a particular function
Epidermal Tissue:
Covers the plant.
Xylem and phloem:
Transports substance around the plant.
What adaption in the leaf helps protect it?
A thin, waxy cuticle made of wax. (wax cuticle)
What adaptation in a leaf allows more light to reach the palisade cells?
A thin, transparent epidermis.
What absorbs light in a leaf?
The layer of palisade cells on the top surface of the leaf.
How do the palisade cells absorb light?
They contain a lot of chloroplasts.
What do spongy mesophyll have?
Big air spaces to allow carbon dioxide to diffuse through the leaf, and to increase the surface area
Types of plant organ:
- Stem
- Root
- Leaf
Leaf adaptation: Chlorophyll:
To absorb sunlight.
Leaf adaptation: Large surface area:
To absorb more light
Leaf adaptation: Stomata:
To let carbon dioxide diffuse into the leaf.
Why is a leaf cell being thin useful?
Shorter distance for carbon dioxide to diffuse into the leaf cell.
What is the purpose of the network of veins on a leaf?
Supports the leaf, transports water and carbohydrates.
