LAB THREE: Body Tissues and the Integumentary System Describe the characteristics of epithelial tissue. (5 points) Epithelial tissue is a sheet of cells which covers a body surface or even lines a body cavity. Covering and lining epithelium forms the outer layer of the skin, dips into and lines the open cavities of the cardiovascular, digestive and respiratory systems, and also covers the walls and organs of the closed ventral body cavity. Glandular epithelium fashions the glands of the body. Special characteristics of the epithelial tissue layer are that these types of tissues are composed almost entirely of close packed cells.
The blood consists of two major portions: blood cells and plasma. The functions of the cardiovascular system: the cardiovascular system is so important to our body, that if it stops for a minute, rapid death will occur. The flow of blood is necessary for existence of life. If the flow of blood stopped, life will stop. Cardiovascular system has three main functions: Transport of nutrients, oxygen and hormones to cells throughout our body and removal of metabolic wastes such as (carbon dioxide and nitrogenous wastes).
It's also found in the uterus and fallopian tubes. The movement of cilia move the ovum to the uterus. Glandular Epithelium are basically columnar epithelium with goblet cells. Some parts consist of such a large number of goblet cells that there are only a few normal epithelial cells left. They secrete substances
Epithelial tissues line the cavities and surfaces of structures throughout the body, and also form many glands. Functions of epithelial cells include secretion, selective absorption, protection, cellular transport and detection of sensation. Epithelial layers are avascular, meaning they contain no blood vessels and rely on underlying vascular tissues to absorb nutrients from. Epithelia can also be organized into clusters of cells that function as exocrine and endocrine glands. Exocrine and endocrine epithelial cells are highly vascular.
P2 There are two different types of epithelial tissue these are simple and compound. Simple Epithelium- this type of epithelium tissue is from an animal consisting of one of more layers of closely packed cells. The cells can vary in structure depending on their function which may be protective, secretory or absorptive. This epithelium tissue covers external and internal surfaces of the body. Compound Epithelium – this type of epithelial tissue is made to withstand wear and tear.
Week 5 Forum Student’s Name Institutional Affiliation Date The amygdala and hippocampus are the main parts of the brain whose responsibility is the regulation of memory. The amygdala is divided into two, the right and left hemispheres. The right hemisphere is responsible for negative emotions like fear and sadness while the left hemisphere induces both the pleasant and unpleasant emotions when stimulated. These hemispheres have independent memory systems but they work together to encode, store and interpret information. The hippocampus on the other side is responsible for the production of corticosteroids (chemicals that produce physiological responses to stimuli).
Provide sensation. Specialized epithelial cells can detect changes in the environments and relay the information to the nervous system. 4. Produce specialized secretions. Epithelial cells that produce secretions are called gland cells.
Unit 8 – M1, M2 & D1 – M1 – Analyse the contribution of these different psychological perspectives to the understanding and management of challenging behaviour – The Biological Approach – This approach aims to explain all behaviour and experience in terms of how the body processes. When you feel stressed this usually involves several sensations such as your heart pounding and your palms sweating, these are physical symptoms created by the nervous system reacting. Your experiences, such as stress are caused by a biological process. The nervous system is divided into the central nervous system and the autonomic nervous system which is further subdivided into the sympathetic and parasympathetic branches. The central nervous system the brain and spinal cord contain about 12 billion nerve cells/neurons.
This system contains two major types of neurons: sensory neurons (or afferent neurons) that carry information from the nerves to the central nervous system, and motor neurons (or efferent neurons) that carry information from the brain and spinal cord to muscle fibers throughout the body. The Autonomic Nervous System The autonomic system is the part of the peripheral nervous system responsible for regulating involuntary body functions, such as blood flow, heartbeat, digestion and breathing. This system is further divided into two branches: the sympathetic system regulates the flight-or-fight responses, while the parasympathetic system helps maintain normal body functions and conserves physical
Its five main regions help regulate basic life processes, including breathing, pulse, arousal, movement, balance and sleep and the early stage of processing sensory information. The central core consists of the thalamus which relays sensory and motor signals to cerebral cortex, the pons which relay signals from the forebrain to the cerebellum, the cerebellum which deals with motor control, the reticular formation which deals with multiple tasks such as regulating the sleep-wake cycle and filtering incoming stimuli to discriminate irrelevant background stimuli, and finally the medulla which contains the cardiac, respiratory, vomiting and vasomotor centers and so deals with the autonomic (involuntary) functions of breathing, heart rate and blood pressure. (The Central Core, Discovering Psychology) The limbic system exists only in mammals. Its regions mediate motivated behaviours, emotional states, and memory processes. The limbic system regulates body temperature, blood pressure, blood sugar level, and other housekeeping activites.