Presentation on theme: "Body Planes, Directions, & Cavities"— Presentation transcript:
1 Body Planes, Directions, & Cavities Principles of Health Science
2 Body Cavities Why do we have body cavities? Body Cavities are openings within the torso which contain organs.They protect delicate organs from accidental shocks and bumps, and permit the expansion and contraction of organs without disrupting the activities of other organs.
3 Body PlanesImaginary lines drawn through the body to separate the body into sectionsTransverseSagittalFrontal or coronal
4 Transverse planeHorizontal plane that divides the body into a top & bottom half
5 Sagittal plane Divides the body into left and right sides Midsagittal divides the body into equal left and right sides
6 Frontal (or coronal) plane Divides the body into a front and back section
7 Directions Superior vs inferior Cranial vs caudal Medial vs lateral Anterior vs posteriorDorsal vs ventralProximal vs distal
8 Superior vs inferior Superior: towards the top Inferior: towards the bottom
9 Cranial vs caudal Cranial: towards the head Caudal: towards the tail More commonly used in animalsPeople: same as superior/inferior
10 Medial vs lateral Medial: close or towards the midline Lateral: away from the midline
11 Anterior vs posterior Anterior: towards the front of the body Posterior: towards the back of the body
12 Dorsal vs ventral Dorsal: towards the back Ventral: towards the abdomenUse more commonly in animalsPeople: same as anterior/posterior
13 Proximal vs distal Proximal: towards the trunk Distal: away from the trunk
15 Dorsal cavity Cranial cavity: contains the brain Spinal cavity: contains the spinal cord
16 Ventral cavityThoracic cavity: contains esophagus, heart, lungs, tracheaAbdominopelvic cavityAbdominal cavity: stomach, small intestine, liver, gallbladder, pancreas, spleenPelvic cavity: urinary bladder, reproductive organDiaphragm: muscle that separates the thoracic cavity from the abdominopelvic
17 The portion of ventral cavity superior to the diaphragm. a. Pleural Cavities - the spaces surrounding each lung.b. Mediastinum - a broad middle tissue mass of the thoracic cavity dividing the lungs into two cavities.
18 Thoracic CavityIt includes the aorta, other great blood vessels, esophagus, trachea, thymus, pericardial cavity, and heart.c. Pericardial Cavity - space in which the heart is located
19 Abdominal CavityAbdominal Cavity - The superior portion of the abdominopelvic cavity. It extends from the diaphragm to the superior margin of the pelvic girdle.Contains the organs known as the viscera which include the stomach, spleen, liver, gallbladder, pancreas, small intestine, and most of the large intestine.
20 Pelvic Cavity Surrounded by the pelvic bones. The pelvic cavity contains the urinary bladder, cecum, appendix, sigmoid colon, rectum, and the male or female internal reproductive organs
21 Abdominal quadrants Four quadrants with the umbilicus at the center RUQ LUQ RLQ LLQ
24 Image CitationsSlide 11: photo of a dog illustrating dorsal, ventral, anterior and posterior, 8/27/06,Slide 14: Body cavities, 8/31/06,Slide 16, 17: Delmar Learning’s Medical Terminology Image Library, Second Edition, Version 1.0, 2003.