Earth Dynamics and Biological Respiration Systems
The Lithosphere and Geological Dynamics
The lithosphere is the outer layer of the geosphere. It consists of the terrestrial crust and the external mantle. There are three types of plate boundaries: convergent, divergent, and passive edges.
Volcanoes and Seismic Activity
Volcanoes are holes or cracks through which molten material is ejected from the inside of the geosphere. They are classified into two types: subaerial and submarine volcanoes. Earthquakes are seismic shocks or abrupt movements of the terrain with varying intensity and usually short duration.
Land Relief and the Lithologic Cycle
Land relief is generally the result of many geological processes caused by the Earth's internal energy and solar energy. The lithologic cycle is the set of geological processes through which each of the three main groups of rocks is formed from magma. Magmas are masses of molten material that contain some solid crystals and gases.
Types of Rocks
- Intrusive or Plutonic rocks
- Volcanic or Effusive rocks
- Metamorphic rocks: These involve the solid-state transformation of existing rocks subjected to high pressure and temperature changes inside the lithosphere.
Weathering and Water Erosion
Energy causes changes through two types of weathering:
- Physical weathering: Caused by gelifraction, abrupt temperature changes, and the actions of many living beings.
- Chemical weathering: Includes oxidation, carbonation, and the activity of living beings.
Water types in gullies include wild waters, diffuse streams, and concentrated streams. Groundwater (or infiltration water) refers to all water that infiltrates the field and passes into the subsoil. Seawater movements include waves, currents, and tides.
Glaciers and Ice Masses
Glaciers are thick ice masses that move downhill through their own weight. Types include inlandsis and valley glaciers.
Biological Functions and Systems
Types of Animal Respiration
- Cutaneous respiration: Performed through the skin, as seen in terrestrial annelids and amphibians.
- Gill respiration: Aquatic animals use gills, which are thin laminae with many blood vessels in contact with water.
- Tracheal respiration: In insects, the tracheae branch through the entire body to reach the cells.
- Lung respiration: Terrestrial vertebrates use internal cavities. In mammals, lungs have alveoli, while birds utilize air sacs and branched structures.
Sensory Receptors and Stimuli
Receptors are specialized cells designed to receive various stimuli. They are categorized as external (picking up information from the outside) or internal (from the interior).
Specific Receptor Types
- Photoreceptors: Detect light stimuli.
- Chemoreceptors: Stimulated by chemical substances and odors.
- Mechanoreceptors: Detect touch and pain.
- Thermoreceptors: Discriminate between heat and cold.
- Electroreceptors: Detect electric power.
Methods of Reproduction
- Sexual reproduction: Involves two parents and two specialized sex cells or gametes.
- Asexual reproduction: Involves one parent and produces identical copies; common in unicellular organisms, some plants, and animals.