. Biologie avancée. Biologie ; physiologie ; la reproduction. 84 Les tissus musculaires du tissu conjonctif 111 membres. Larme ou séparer le imiscle en parties. Remarquez que le muscle est divisé en petits ))undles. Essayez de retirer l'un des petits paquets des autres. Nommer et décrire le tissu qui sépare un faisceau à partir d'un autre. Décrire la forme de chaque petit paquet. Décrire l'arrangement des bottes en composant l'en- muscle de pneus. Problème. La structure de skel- etal muscle. Sélectionnez un minuscule paquet de muscle ; placez-le à plat sur la lame de verre et ajouter une goutte de diluer l'iode. Couvrir avec un c

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. Advanced biology. Biology; Physiology; Reproduction. 84 HUMAN TISSUES Connective tissue muscle bers 111. Tear or separate the imiscle into parts. Notice that the muscle is divided into little ))undles. Try to remove one of the little bundles from the others. Name and describe the tissue that separates one bundle from another. Describe the shape of each little bundle. Describe the arrangement of the bundles in making up the en- tire muscle. Problem. The structure of skel- etal muscle. Select a tiny muscle bundle; place it flat on the glass slide and add a drop of dilute iodine. Cover with a cover glass and focus under low power, then high power. I. Observe the long individual muscle fibers and find the tiny cross markings called striations. Skeletal muscle is often called striated muscle because of the presence of these char- acteristic cross markings. II. Draw two or three muscle fibers five times larger than they appear under the microscope. Label fiber and striations. III. Examine a prepared slide of striated muscle. Describe the ap- pearance and location of the nuclei scattered along each fiber.. on. A muscle is made of bundles of muscle fibers, each bundle surrounded by connective tissue. A thick external layer of this connec- tive tissue is continuous with the tendon which is composed entirely of connective tissue. The tendon joins the muscle to a bone. Problem. The structure of smooth or involuntary muscle. Mount a prepared slide of smooth muscle under the microscope. I. How does smooth muscle differ from striated muscle in appearance and shape of fiber and in nuclei ? II. Smooth muscle is called smooth or unstriated muscle because of the absence of cross-striations. It is also called involuntarv because it is not under the control of the will. It is found in many internal organs such as the walls of the stomach and intestine, and is responsible for movement in these organs. III. Draw and label two or three smooth muscle cells.. Please note that these images

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