Содержание
- 2. Receptors provide information about both external and internal environments. The receptors of the human are located
- 3. Types of sensory receptors
- 4. Processing Sites and Lobes of the Cerebral Cortex
- 5. It provides more than 80% of the information received about the external environment. THE EYE
- 7. STRUCTURE OF EYE Eyes contain 3 main parts; Schlerenchyma Choroid Retina
- 8. Schlerenchyma It is supportive structure of eye that protects inner structures of the eye. In the
- 9. CHOROID Just inside the sclera is the choroid. This layer contains many blood vessels. At the
- 10. The diameter of iris is related to the amount of light. It narrows pupil under intense
- 11. THE RETINA Behind the iris is the lens. It focuses the light on the retina (photoreceptor).
- 14. Light entering the eye passes through the cornea, pupil, lens, and forms an image on the
- 15. Cones are sensitive to color and bright light. Rods are sensitive to dim light but not
- 17. A severe dificiency of vitamin A leads to a condition called night blindnes. In this condition
- 19. While at rest, instead of focusing on the retina, the light rays focus in front of
- 20. At rest, the light rays focus behind instead of on the retina. This type of eye
- 21. The human ear has 2 sensory functions. One of them is hearing. Other is maintaning balance
- 22. Structure of ears Ears contains 3 main parts; Outer ear The middle ear Inner ear
- 24. 1. OUTER EAR Outer ear is composed of 3 parts. These are pinna, auditory canal and
- 25. Auditory canal is a canal which is found between pinna and eardrum. It has hairs and
- 26. 2. MIDDLE EAR It contains three small bones which are called the hammer-malleus, anvil-incus and stirrup-stapes.
- 28. EUSTACHIAN TUBE It is located between pharynx and the middle ear. It equalizes air pressure between
- 29. 3. THE INNER EAR It consists of the cochlea and semicircular canals. Cochlea is organ of
- 30. They are separated from another by membranes. Lining of the membranes are specialized hair cells that
- 32. Semicircular canals enable the body to maintain balance. These canals contain fluid and hairlike projenctions that
- 34. Sound waves collected by outer ear pass down the auditory canal to the eardrum. They cause
- 35. Vibration of stirrup cause vibrations in the oval window which in turn cause the fluid within
- 37. All multicellular organisms have a skin composed of one or more layers. THE SKIN
- 39. Functions of Skin It protects the inner layers of the body from physical and chemical effects.
- 40. Skin is composed of 3 tissue layers: Epidermis Dermis Hypodermis Skin Structure
- 41. EPIDERMIS is outermost layer of skin. This layer composed of keratinised epithelial cells. Epidermis do not
- 42. RECEPTORS Meisner corpuscles: They are involved in reception of touch of the palm sole and lips.
- 46. Sweat glands: They are present in all regions of the skin. They open onto the surface
- 47. Nose is the organ of the body involved in both respiration and smell. The reception of
- 51. The surface of the tongue is covered with small projections called papillae. There are the taste
- 53. Only substances that are in solution can stimulate the taste buds. The taste buds are sensitive
- 54. When taste buds are stimulated, impulses are initiated by the sensory cells of the structure and
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