Breathing rate
(Science: chest medicine, clinical sign) also referred to as the respiratory rate.
Measured as the number of breaths taken every minute. Normal resting adult respiratory rates are from 16-20 breaths per minute.
The normal 1 year old infant can have a respiratory rate of 30 breaths per minute. Count the breaths taken in 30 seconds observing the rise and fall of the chest and then multiply this number by 2.
The human respiratory system is an efficient system of inspiring and expiring respiratory gases. This tutorial provides details of the different parts and functions of the respiratory system...
Plants need to regulate water in order to stay upright and structurally stable. Find out the different evolutionary adaptations of plants in terms of structure (e.g. stomata) and physiological mechanisms (e.g. root pressure, capillarity, transpiration pull, curving of leaves, etc.) that enabled them to maintain the appropriate water level...
The blood sugar level is regulated by two hormones. The mechanism behind this type of negative feedback control is described in this tutorial. Failure to regulate blood sugar levels could lead to physiological disorders and diseases, such as diabetes. Read this tutorial to learn more...
Photosynthesis is the process that plants undertake to create organic materials from carbon dioxide and water, with the help of sunlight- all of which are investigated in this tutorial...
Plants and animals need elements, such as nitrogen, phosphorus, potassium, and magnesium for proper growth and development. Certain chemicals though can halt growth, e.g. herbicides in plants, or affect normal physiological activities, e.g. alcohol. For more info, read this tutorial on the effects of chemicals on plants and animals...
