Study "cell diversity", a flashcard deck on FORKSAI.
Define the term 'tissue' and provide two examples of plant tissue and two examples of animal tissue.
A tissue is a group of similar cells that share the same structure and function. Examples of plant tissues include meristematic tissue and dermal tissue. Examples of animal tissues include epithelial tissue and muscular tissue.
Explain what tissue culture is and describe two of its practical applications.
Tissue culture is the growth of cells in a medium outside of an organism, often referred to as in vitro growth. Two applications include micropropagation for plant breeding, where new plants are grown from small tissue samples, and the production of monoclonal antibodies for cancer research.
Define 'organ' and give one example from a plant and one from an animal.
An organ is a group of different tissues that work together to carry out a specific function. An example of a plant organ is a leaf, which performs photosynthesis. An example of an animal organ is the heart, which pumps blood throughout the body.
What is an organ system? Provide two examples of animal organ systems.
An organ system is a group of organs working together to undertake specific functions within an organism. Two examples of animal organ systems are the circulatory system, responsible for transporting substances, and the nervous system, which coordinates body activities through electrical impulses.
How does epithelial tissue function in animals, and where is it typically found?
Epithelial tissue primarily functions to cover surfaces of the body, forming protective layers. It is typically found lining organs, cavities, and the outer surface of the body, such as the skin.
Distinguish between the roles of xylem and phloem within plant vascular tissue.
Xylem transports water and minerals from the roots to the aerial parts of the plant, always moving upwards. Phloem transports food produced during photosynthesis to all parts of the plant, with movement occurring both upwards and downwards.
Why is blood considered a connective tissue in animals?
Blood is considered a connective tissue because it consists of cells (red cells, white cells, platelets) dispersed in a matrix (plasma) and connects all parts of the body to transport oxygen, nutrients, and waste products.
Describe the primary function of nervous tissue and identify the specialized cells within it.
Nervous tissue is adapted to carrying electrical impulses throughout the body, sending messages to and from the brain and spinal cord to enable quick responses to stimuli. The specialized cells within nervous tissue are called neurons.
How does the heart exemplify the organization of tissues into an organ?
The heart exemplifies an organ by containing all four major types of animal tissue: cardiac muscle tissue for pumping blood, epithelial tissue as a surrounding membrane, connective tissue in the form of blood, and nervous tissue as a pacemaker controlling the heartbeat.
What are the key requirements for successful tissue culture?
Successful tissue culture requires a sterile environment to prevent contamination, a supply of essential nutrients for cell growth, and suitable environmental conditions, such as appropriate temperature and pH, to support cell viability and proliferation.