IWBAT identify anatomical direction and body planes Do

IWBAT: identify anatomical direction and body planes Do Now: The region that contains the navel is the: A) umbilical region B) orbital region C) carpal region D) anterior knee E) inguinal region HW: Worksheet

Body Cavities • Body cavities have two essential functions – Protect organs from accidental shocks – Permit changes in size and shape of internal organs

Body Cavities • The cavities are fluid filled spaces which contain the internal organs. Organs within these cavities are called viscera. • The two main cavities are called: – dorsal cavities • Cranial cavity • Vertebral cavity – ventral cavities • Thoracic cavity • Abdominopelvic cavity

Body Cavities • Dorsal cavity protects the nervous system, and is divided into two subdivisions – Cranial cavity – within the skull; encases the brain – Vertebral cavity – runs within the vertebral column; encases the spinal cord • Ventral cavity houses the internal organs (viscera), and is divided into two subdivisions – Thoracic – Abdominopelvic

Body Cavities Cranial cavity (contains brain) Thoracic cavity (contains heart and lungs) Dorsal body cavity Diaphragm Vertebral cavity (contains spinal cord) Abdominal cavity (contains digestive viscera) Key: Pelvic cavity (contains bladder, reproductive organs, and rectum) Dorsal body cavity Ventral body cavity (a) Lateral view Figure 1. 9 a

The dorsal body cavity houses the: • A) heart and lungs • B) spinal cord and brain • C) tongue • D) urinary and reproductive organs • E) digestive and reproductive organs

Body Cavities Figure 1. 9 b

Ventral Cavity • The ventral cavity is subdivided into two parts (thoracic and abdominopelvic cavities) by the diaphragm, a domeshaped respiratory muscle.

Thoracic Cavity is commonly known as the chest cavity • Pericardial cavity: houses the heart • Pleural cavity: houses the lungs • Mediastinum: heart, the aorta, the thymus gland, the chest portion of the trachea, the esophagus, lymph nodes

Abdominopelvic Cavity • Abdominal cavity (superior portion) contains the stomach, small intestine, liver, pancreas, spleen, kidneys and most of the large intestines. • Pelvic cavity (inferior portion) contains urinary bladder, internal reproductive organs, and the rectum.

1)The stomach, liver, intestines, bladder, rectum, and reproductive organs are housed in the: • A) abdominopelvic cavity • B) dorsal cavity • C) spinal cavity • D) cranial cavity • E) thoracic cavity

2)Which of these regions in the abdominopelvic cavity are medial: • A) epigastric, umbilical, and hypogastric regions • B) umbilical, right lumbar, and left lumbar regions • C) epigastric, right, and left hypochondriac regions • D) iliac (inguinal), lumbar, and hypogastric regions • E) right and left iliac (inguinal), and hypogastric regions

3)Which ventral cavity subdivision has no bony protection: • A) spinal • B) pelvic • C) abdominal • D) cranial • E) thoracic

4) Which type of section could be used to separate thoracic cavity from the abdominopelvic cavity: • A) dorsal B) transverse C) sagittal D) coronal E) ventral

5)In describing the relationship of the thoracic and spinal cavities: • A) the thoracic cavity is superior to the spinal cavity • B) the thoracic cavity is medial to the spinal cavity • C) the thoracic cavity is proximal to the spinal cavity • D) the thoracic cavity is ventral to the spinal cavity • E) the thoracic cavity is inferior to the spinal cavity

6)The lungs and heart are in the _____ body cavity. • A) spinal • B) thoracic • C) abdominopelvic • D) cranial • E) dorsal

Lateral view: Identify the Cavities…

Anterior view: Identify the Cavities…

The Abdominopelvic Cavity • Peritoneal cavity – chamber within abdominopelvic cavity – Parietal peritoneum lines the internal body wall – Visceral peritoneum covers the organs

Ventral Body Cavity Membranes • Called serous membranes or serosa – Parietal serosa lines internal body walls – Visceral serosa covers the internal organs – Serous fluid separates the serosae

Heart Serosae Figure 1. 10 b

Serous Membrane Relationship Figure 1. 10 a

Other Body Cavities • • • Oral cavity Nasal cavity Orbital cavities Middle ear cavities Synovial cavities

Other Body Cavities • Oral and digestive – mouth and cavities of the digestive organs • Nasal –located within and posterior to the Nasal nose • Orbital – house the eyes Orbital • Middle ear – contain bones (ossicles) that ear transmit sound vibrations • Synovial – joint cavities Synovial

Review sheet for test Chapter 1