Final Study Guide - Final Study Guide Lab 8 Rat Anatomy Rattus rattus Model organism-representative vertebrate Representative of subclass of mammal

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Lab 8: Rat Anatomy Rattus rattus Model organism—representative vertebrate Representative of subclass of mammal known as Eutharia: the mammals with a well-developed placenta. Humans belong to this subclass as well. Gross anatomy: refers to the study of body structures visible to the eye. Anatomical terms: o Anterior: at or toward the head or front end. o Posterior at or toward the tail or rear end. o Ventral: at or toward the belly or front. o Cranial: toward the head o Caudal: toward the tail. o Medial: toward the midline of the body. o Lateral: away from the midline of the body. o Proximal: near a body part or point of reference. o Distal: away from a body part that is a point of reference. o Superior: above a body part that is a point of reference (mainly used with bipedal animals). o Interior: below a body part that is a point of reference (mainly used with bipedal animals). o Sagittal section: a section that is made parallel to the long axis of the body, and that divides the body into right and left halves. o Frontal section: a section that is made along a longitudinal plane that divides the body into ventral and dorsal regions. o Transverse (cross) section: any section that is made perpendicular to the longitudinal or frontal plane. Body cavities: o Coelom: the body cavity formed between layers of mesoderm and in which the digestive tract and other internal organs are suspended. o Thoracic (chest) cavity: the region of the coelom that is most cranial; it is separated from the caudal region by the diaphragm. o Pleural cavities: the cavities within the thoracic cavity that contain the lungs. o Pericardil cavitiy: the cavity within the thoracic cavity that contains the heart. o Abdominal cavity: the region of the coelom that is most caudal; it is separated from the cranial region by the diaphragm. External structures of rat: o Anus beneath tail. o Males will have large scrotal sacs at base of tail and penis anterior to anus. o
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This note was uploaded on 05/09/2008 for the course BIO 206L taught by Professor Unknown during the Spring '08 term at University of Texas at Austin.

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Final Study Guide - Final Study Guide Lab 8 Rat Anatomy Rattus rattus Model organism-representative vertebrate Representative of subclass of mammal

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