what are the 4 major body cavities?
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Humans have four body cavities: (1) the dorsal body cavity that encloses the brain and spinal cord; (2) the thoracic cavity that encloses the heart and lungs; (3) the abdominal cavity that encloses most of the digestive organs and kidneys; and (4) the pelvic cavity that encloses the bladder and reproductive organs.
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dorsal cavity: The cavity in the back of the body that contains the cranial and vertebral cavities, which house the brain and spinal cord respectively.
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Thoracic cavity. ... Thoracic cavity, also called chest cavity, the second largest hollow space of the body. It is enclosed by the ribs, the vertebral column, and the sternum, or breastbone, and is separated from the abdominal cavity (the body's largest hollow space) by a muscular and membranous partition, the diaphragm.
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['Human Axial Skeleton. The axial skeleton forms the central axis of the human body and includes the bones of the skull, the ossicles of the middle ear, the hyoid bone of the throat, the vertebral column, and the thoracic cage (ribcage). ... ', 'The Skull. ... ', 'The Vertebral Column. ... ', 'The Thoracic Cage.']
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['The Nose and Nasal Cavities Provide Airways for Respiration. ... ', 'The Paranasal Sinuses Surround the Nasal Cavities. ... ', 'The Pharynx Connects the Nasal and Oral Cavities to the Larynx and Esophagus.']
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Mouth, also called oral cavity or buccal cavity, in human anatomy, orifice through which food and air enter the body. ... It is divided into two sections: the vestibule, the area between the cheeks and the teeth, and the oral cavity proper.
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DIVISIONS OF THE THORAX The thoracic cavity is divided into three main regions: (1) the right pleural cavity, (2) the left pleural cavity (the pleural cavities contain the lungs), and (3) the mediastinum, a midline structure that separates the right and left pleural cavities.
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The floor of the cranial cavity is divided into three distinct depressions. They are known as the anterior cranial fossa, middle cranial fossa and posterior cranial fossa. Each fossa accommodates a different part of the brain.
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["Nose and Nasal Cavity. The nose and nasal cavity form the main external opening for the respiratory system and are the first section of the body's airway—the respiratory tract through which air moves. ... ", 'Mouth. ... ', 'Pharynx. ... ', 'Larynx. ... ', 'Trachea. ... ', 'Bronchi and Bronchioles. ... ', 'Lungs. ... ', 'Muscles of Respiration.']
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There are 11 major organ systems in the human organism. They are the integumentary, skeletal, muscular, nervous, endocrine, cardiovascular, lymphatic, respiratory, digestive, urinary, and reproductive systems.
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['Enamel. Enamel is the outer most layer of the tooth that protects teeth from the elements that cause cavities. ... ', 'Dentin. The layer directly beneath enamel is dentin, which is made up of microscopic tubes!', 'Cementum. Cementum is layer between the root of teeth and gums. ... ', 'Pulp. ... ', "Protect Your Child's Teeth."]
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There are 4 types of teeth in the oral cavity: Incisors – The four front teeth in both the upper and lower jaws are called incisors. Their primary function is to cut food. The two incisors on either side of the midline are known as central incisors.
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The body cavities house and protect the internal organs. There are two main body cavities: the dorsal cavity and the ventral cavity.
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The coelom is the main body cavity in most animals and is positioned inside the body to surround and contain the digestive tract and other organs. In some animals, it is lined with mesothelium. In other animals, such as molluscs, it remains undifferentiated.
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['cardiac, which contains mucous secreting glands (called cardiac glands) and is closest to the oesophagus.', 'fundus, the body or largest part of the stomach which contain the gastric (fundic) glands.', 'pyloric, which secretes two types of mucus, and the hormone gastrin.']
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Name two essential functions of the body cavities of the trunk. protect internal organs and cushion them from thumps and bumps that occur while walking / running, or jumping. They also permit the organs that they surround to change in size and shape w/o disrupting the activities of nearby organs.
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['Cavities. Cavities are also called caries or tooth decay. ... ', 'Gum disease (gingivitis) Gum disease, also called gingivitis, is inflammation of the gums. ... ', 'Periodontitis. ... ', 'Cracked or broken teeth. ... ', 'Sensitive teeth. ... ', 'Oral cancer.']