Key Concepts in Biology
Characteristics of Living Organisms
- Living things have motion; they move. Plants move in order to catch sunlight for photosynthesis.
- Living things respire. Respiration is a chemical reaction which occurs inside cells to release energy from the food consumed.
- Living things are sensitive to stimuli and have the ability to sense changes in their environment.
- They grow. Living things mature and grow through different stages of development.
- They acquire and fulfill nutritional requirements to survive through
Plant Biology: Nutrition, Transport, and Gas Exchange
Plant Biology
Nutrition, Transport, and Gas Exchange
1. Introduction
Plants perform essential processes such as nutrient uptake, food digestion, gas exchange, transport, metabolism, and excretion. This document will explore these processes in detail.
2. Plant Structure and Function
Plants, such as algae and cormophytes, have specialized structures for different functions. Cormophytes possess leaves for photosynthesis, stems for support and circulation (xylem and phloem), and roots for water and nutrient
Read MoreHuman Body Systems: Digestion, Respiration, and Coordination
Item 4: Digestion and Key Body Systems
Digestion is the process of transforming food into molecules that can be absorbed in the gut, distributed by the blood, and used by the body’s cells. This involves both mechanical and chemical processing.
FUN.NUTRICION are designed to provide the food and necessary nutrients for energy production and essential materials for maintaining life.
SIS.RESPIRATORIO, digestive, circulatory, and excretory systems work together to support bodily functions.
Blood Components
Read MoreAnimal Breathing: Types and Respiratory Processes
Usually, the inclusion of oxygen into an animal’s body is called breathing, but breathing encompasses three processes:
- Ventilation: Oxygen is taken from the environment and brought to the respiratory organ, and carbon dioxide is expelled.
- Gas Exchange: This occurs between respiratory organs and blood. The exchange takes place by diffusion, a process by which molecules pass from a more concentrated region to a less concentrated one without expenditure of energy. These regions are separated by a semipermeable
Human Body Systems: Digestion and Respiration Explained
The Importance of Nutrients and Body Systems
The cells of all organisms need nutrients to grow and function. Heterotrophic organisms, like us, can’t produce their own nutrients. They obtain them from food. Multicellular organisms have many organs. These organs are grouped together into different systems that perform diverse functions. Five important systems work together to maintain our organisms correctly: Digestive, Respiratory, Circulatory, Excretory, and Lymphatic systems.