Tissues, organs and organ systems Flashcards
True or false. A tissue is made of groups of specific cells with those similar in structure and function.
True
What are the three tissues in animals?
Muscular, glandular and epithelial
What is the role of muscular tissue?
Contracts to bring about movement.
What is the role of glandular tissue?
Contains secretary cells that can produce substances such as enzymes and hormones.
What is the role of epithelial tissue?
Covers the outside of your body and internal organs. skin is an example.
In the digestive system, what is the role of the glands?
Glands such as the pancreas make and release digestive juices containing enzymes to break down your food.
In the digestive system, what is the role of the stomach?
The stomach is where food is broken down and digested. Enzymes break the large insoluble molecules in to smaller more soluble ones.
What is the function of the small intestine?
The small intestine breaks down insoluble molecules in to soluble ones and is adapted to have a very large surface area increasing the rate of diffusion from the gut to the blood.
What is the role of the large intestine?
In the large intestine water is absorbed from the undigested food in to the blood.
Is the liver or kidney involved in the digestive system? What is its role?
liver. Produces bile to help the digestion of fats.
Name as many plant organs as you can.
Roots, stem, leaves and flower.
What are the types and roles of plant tissues?
Epidermal tissue- covers plant.
Xylem and Phloem- transports water, minerals and dissolved food.
Mesophyll tissue- carries out photosynthesis.
Describe the structure of a leaf.
At the top of the leaf is the upper epidermal tissue. this tissue covers the plant. Below that is the mesophyll tissue which is made of the plaisade layer and the spongy layer. The mesophyll tissue carries out photosynthesis. Lots of chloroplasts can be found here to help to carry out photosyntheis. The xylem transports water and mineral and the phloem transports diddolved food. At the bottom of the leaf is the lower epidermis and stomata. the stomata allow gases to move in and out of the airspaces in the plant.
