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Results for: 'ear and its anatomic structures'
By: Administrator, Views: 9890
Anatomic: Body erect, head facing forward, arms by the sides with palms to the front; used as a standard anatomical position of reference Dorsal recumbent: On back with lower extremities flexed and rotated outward; used in application of obstetric forceps, vaginal and rectal examination, and ...
By: Administrator, Views: 717
An electrocardiogram (ECG, EKG) is a commonly used procedure in which the electrical events associated with the beating of the heart are evaluated. (A) Skin electrodes are applied to the chest wall, which send electrical signals to a computer that interprets the signals into graph form. An ele...
Structures that affect circulation - venous return
By: HWC, Views: 6448
• Venous return directly affects cardiac output. • Increased venous return leads directly to greater cardiac output whereas decreased return contributes to decreased output. • Venous return depends on: • Blood volume regulation by the kidneys. • Venous tone. • Skeletal muscl...
Structures that affect circulation - kidneys, blood volume and venous tone
By: HWC, Views: 6618
• Kidneys regulate blood volume and blood osmolarity via salt and water reabsorption. • Increased reabsorption increases blood volume and venous return (and CO). • Decreased reabsorption increases urine production, which decreases blood volume and venous return (and CO). • Systemi...
Structures that affect circulation - arterioles and vasomotor responses
By: HWC, Views: 6340
■ Small arteries and arterioles determine SVR. ■ Blood pressure drops significantly as blood passes through arterioles. ■ Decreasing arteriole radius and decreased wall elasticity are the main reasons for increased SVR. ■ Small changes in arteriole radius can cause large changes in ...
Brief Summary on Photosynthesis - Animation
By: HWC, Views: 5627
Can increase its weight by 150 pounds as it grows. Where does the new tissue come from? From the soil? From water? Or possibly from the air? The amazing truth is that new material. comes from an invisible gas in the air. In the process of photosynthesis, plants capture carbon dioxide ga...
Brain Anatomy Animation (Part 1 of 2)
By: Administrator, Views: 9956
The human brain is the central organ of the human nervous system, and with the spinal cord makes up the central nervous system. The brain consists of the cerebrum, the brainstem and the cerebellum. It controls most of the activities of the body, processing, integrating, and coordinating the infor...
Mendel's pea plant, Pisum sativum experimental
By: HWC, Views: 4497
Mendel chose the garden pea plant, Pisum sativum, for experimental tests of his ideas about inheritance. Under normal circumstances, the garden pea plant is self-fertilizing. This cross-section shows the gamete-forming structures. Sperm-producing pollen grains form in the stamens. Eggs deve...
By: Administrator, Views: 9593
The ear is the organ of hearing and, in mammals, balance. In mammals, the ear is usually described as having three parts—the outer ear, the middle ear and the inner ear. The outer ear consists of the pinna and the ear canal. Since the outer ear is the only visible portion of the ear in most ani...
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