Circulatory System

Hematopoiesis from Pluripotent Stem Cell

This site was designed for students of anatomy and physiology. It contains textbook resources, such as chapter review guides, homework sets, tutorials, and printable images. Each chapter has a practice quiz and study tips for learning the topic.

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Pumps materials as a fluid quickly around body Double circulatory system:

Capillary network in skeletal or striated muscle. The many loops allow the capillaries to change their length in response to changes in the length of muscle fibers during contraction relaxation. Dr. Richard Kessel Dr. Randy Kardon/Tissues Organs/Visuals Unlimited, Inc.

Heart disease is the number one cause of death around the globe. While approximately 50,000 people are candidates for transplants, only about 5,000 are per

http://www.cincinnatichildrens.org/health/t/transposition/ In cases of transposition of the great arteries (aorta and pulmonary artery), these vessels are "...

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the single-chip system combines capacitive micro-machined ultrasonic transducer arrays with front-end CMOS electronics technology to provide 3D images.

Drawing blood should be a routine procedure. Unfortunately complications can be common either in the elderly, who may have a compromised vasculature, or in children who are literally scared out of their minds. A startup based in Mountain View, California aims to replace your friendly phlebotomist with a robot. If this new device can gain patient confidence and perform well under ideal conditions, perhaps it can also be of service in more demanding conditions as well. Read more: Meet your new…

Cardiac

Let Me Count The Ways (of Measuring Your Heart Rate!) Valentine's Day does not have to go unnoticed in our high school biology classes! We might not discuss the emotional affairs of the heart, but we can definitely discuss the physiology of the heart! Each year, during the week of Valentine's Day, I take my biology students to the lab to measure the heart rate in the crustacean, Daphnia. Since Daphnia is an ectotherm, its heart rate will vary with changes in its body temperature. (I also…

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