the longest and strongest bone in the body. The femur connects through the knee joint (which is covered and protected by the patella, or kneecap) to the shin bone (tibia). Slightly smaller than the tibia is the other bone in the leg, the fibula. Each foot has 26 bones:...
a) How many of the twelve body systems are tubular? b) How many are located on or open onto the external surface? How many different cells make up the human body and how do they differ from hair cells? (a) Describe the structure of the lungs. (b) What is its function?
They gathered as much information as possible from scientific research papers to find the total number of cells in the various organs and systems of an average person, and added up these results to get the titanic total of 37.2 trillion. Counting the number of cells in a human being may ...
After reading one of the Body Systems - Go take a Quiz! Move it or Lose it! This term can be directly applied to a sarcomere.A sarcomere is tiny portion of a myofibril (myo means muscle), which is a portion of a single muscle fiber, which is part of a bundle of muscle fibers we...
How Human Reproduction Works By:Craig Freudenrich, Ph.D.&Molly Edmonds Do you turn to the story of the stork?Da-kuk / Getty Images In the Middle Ages, the summer solstice was a big event for Europeans.Weddingswere planned for that day, and many communities held large parties with plenty...
The cardiovascular, skeletal and muscle systems are all fully developed. Breast Development in Pubescent Girls Breast development in most girls begins between the ages of 7 and 13. It's often the first physical marker of the onset of puberty. (If a girl is overweight, it may appear that ...
How Many Body Systems Do We Have? There are 12 body systems, including the digestive, endocrine, skeletal, respiratory, nervous, immune and circulatory systems. A complete description of these systems is below. Supporting each system goes a long way in supporting our energy and vitality; and cr...
You don't have to think about breathing because your body's autonomic nervous system controls it, as it does many other functions in your body. If you try to hold your breath, your body will override your action and force you to let out that breath and start breathing again. The respira...
The interstitium is found throughout the human body, including in tissues under the skin, in the digestive and respiratory systems, and around the muscles. According to the initial study, interstitium protects the body and produces lymph, the fluid that's essential to immune ...
On average, how many liters of blood does a human body have?Question:On average, how many liters of blood does a human body have?Blood CompositionBlood is a connective tissue that is composed of formed elements that are suspended in the liquid matrix called plasma. The formed elements...