. Advanced biology. Biology; Physiology; Reproduction. BLOOD TISSUE 87 a^^^c^jrtbri clenolrite^ -aacon shecxth. the dendrites, nerve cells connect with each other. The axon is the process which connects the nerve cell with a structure remote from the cell body. If one hears a sound and walks toward it, an axon has carried the sound from the ear to a nerve cell in the brain. By means of dendrites, a connection w^as set up with another nerve cell which in turn carried the message to muscle cells. The muscle cells contracted so as to make walking possible. Axons vary in length: some are microscop
. Advanced biology. Biology; Physiology; Reproduction. BLOOD TISSUE 87 a^^^c^jrtbri clenolrite^ -aacon shecxth. the dendrites, nerve cells connect with each other. The axon is the process which connects the nerve cell with a structure remote from the cell body. If one hears a sound and walks toward it, an axon has carried the sound from the ear to a nerve cell in the brain. By means of dendrites, a connection w^as set up with another nerve cell which in turn carried the message to muscle cells. The muscle cells contracted so as to make walking possible. Axons vary in length: some are microscopic while others may be as long as two or three feet. The cell body is always of microscopic dimensions. Nerve cells attain the highest development of irritability. They are the highly sensi- tive cells of the body. They receive mes- sages, transmit them, and regulate the responses to these messages. Nerve tissue ^. , ^, ^ ^ sometimes very long, the axon. will be studied in greater detail in a later Although the ceii body, cyton. ° is microscopic, the axon, also microscopic in diameter, may be two or three feet - terminal brandies. The unit of nerve structure is called a neuron. This cell has several processes, one chapter. Blood tissue. Blood is so highly fluid that it is not usually considered a tissue. A tissue has been defined as a group of similar cells, and blood, consequently, may be considered a tissue since it consists of groups of similar cells. Problem. Study of blood tissue. Press the finger near the tip until blood congests. Prick the end of the finger with a needle that has been passed through a flame to sterilize it. Touch a cover glass to the drop of blood on the finger; invert the cover slip on a glass slide. Mount under the low, then under the high power of the microscope. I. Describe the shape, size, and color of the more numerous cells seen. These are the red corpuscles. II. Examine all the substance under the microscope carefully and find an occasion
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Keywords: ., bookcentury1900, bookdecade1920, booksubje, booksubjectphysiology
