Connective Tissue As the name implies‚ connective tissue serves a "connecting" function. It supports and binds other tissues. Unlike epithelial tissue‚ connective tissue typically has cells scattered throughout an extracellular matrix. Loose Connective Tissue In vertebrates‚ the most common type of connective tissue is loose connective tissue. It holds organs in place and attaches epithelial tissue to other underlying tissues. Loose connective tissue is named based on the "weave" and type
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transmitting nerve impulses; a nerve cell Dendrites Dendrites are treelike extensions at the beginning of a neuron that help increase the surface area of the cell body and are covered with synapses Soma The soma is the cell body of a neuron. Axon The Axon of a neuron is a singular fiber that carries information away from the soma to the synaptic sites of other neurons (dendrites and somas)‚ muscles‚ Glial cells Glial cells are non-neural cells that perform "housekeeper" functions such as clearing
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supporter‚ believed that the axons were anastomoses‚ or that the fibers were fused together with a tube.1‚2 Golgi also theorized that the that the nerve impulses were able to travel in any direction.2 The supporters of the neuron
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down even further. There are several more areas within the hippocampal formation and they include the following: Fimbria‚ To septum mammillary bodies‚ Schaffer commissural axon‚ Field CA1‚ Field CA3‚ Schaffer collateral axon‚ Mossy fiber‚ Field CA1‚ Axon in performant path‚ Dentate gyrus‚ Record from denate Gyrus‚ Stimulate axons in performant path‚ Subicular complex and the Entorhinal cortex. All of these individual areas serve a very important function with the overall goal of processing memory
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NERVOUS SYSTEM The nervous system consists of the brain‚ spinal cord‚ sensory organs‚ and all of the nerves that connect these organs with the rest of the body. Together‚ these organs are responsible for the control of the body and communication among its parts. The brain and spinal cord form the control center known as the central nervous system (CNS)‚ where information is evaluated and decisions made. The sensory nerves and sense organs of the peripheral nervous system (PNS) monitor conditions
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of internal organs and body systems; receives and processes sensory information from external environment; coordinated short-term reactions to these stimuli. Cell body: the part that contains the nucleus and most of the cytoplasm and the organelles. Axon: sends messages away from the cell body to other neurons. Dendrite: short‚ highly branched fibers that carry signals toward the cell body of a neuron. Central nervous system (CNS): the division of the nervous system that includes the brain and the
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At the age of three years‚ Jody Miller was having difficulties in moving the left side of her body and began experiencing severe epileptic seizures. She was soon diagnosed with Rasmussen’s Syndrome; a neurodegenerative syndrome including symptoms such as slight paralysis‚ epileptic seizures‚ decline in cognition and behaviour. On the recommendation of a paediatric neurologist‚ Miller underwent an operation that would remove the right hemisphere of her brain‚ known as a hemispherectomy‚ in an attempt
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impulses toward the cell body Cell Body with nucleus – nucleus & most of cytoplasm Axon – fiber which carries impulses away from cell body Schwann Cells- cells which produce myelin or fat layer in the Peripheral Nervous System Myelin sheath – dense lipid layer which insulates the axon – makes the axon look gray Node of Ranvier – gaps or nodes in the myelin sheath Impulses travel from dendrite to cell body to axon Neurotransmitters – Chemicals in the junction which allow impulses to be started
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Messages are sent to other neurons or muscles or glands from the axon and the axon terminal. Axons must be linked to one another for a signal to pass. The space between two neurons where neurotransmitters pass is called a synapse. When a nerve signal travels along the neuron to the synapse‚ neurotransmitters are released to carry that
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emotions and sexual activity. The hypothalamus situated on both sides of the third ventricle‚ below the thalamus. In the hypothalamus there is a paraventricular nucleus‚ which contain large neurons that send axons to the posterior pituitary. The periventricular zone possess cells that send axons to the median eminence (a section of the lower hypothalamus)‚ which then carry to the anterior pituitary‚ released factors. The basalis nucleus is involved in sleep and restlessness. The hypothalamus also has
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