Internal Anatomy
Internal Anatomy - Related Videos
01:12
Internal Anatomy of the Kidney
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2025
The kidneys are essential organs in the human body, performing a myriad of tasks that maintain homeostasis and overall health. Anatomical Position and Dimensions The kidneys are retroperitoneal organs positioned against the posterior abdominal wall on either side of the spine, roughly between the twelfth thoracic and third lumbar vertebrae. Each kidney is typically 10-12 cm long, 5-6 cm wide, and 3-4 cm thick, weighing about 150 grams. Renal Cortex The outermost region of the kidney is the...
09:18
Internal Standards
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2023
Source: Laboratory of Dr. B. Jill Venton - University of Virginia The goal of many chemical analyses is a quantitative analysis, where the amount of a substance in a sample is determined. In order to accurately calculate the concentration of an unknown from a sample, careful sample preparation is key. Every time a sample is handled or transferred, some of the sample can be lost. There are strategies however, for minimizing sample loss. There are also strategies for coping with sample loss and...
02:00
Internal Energy
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2020
The total of all possible kinds of energy present in a substance is called the internal energy (U), sometimes symbolized as E. Suppose a system with initial internal energy, Uinitial, undergoes a change in energy (transfer of work or heat), and the final internal energy of the system is Ufinal. Change in internal energy equals the difference between Ufinal and Uinitial. Although the values for Ufinal and Uinitial cannot be determined for a system, the first law of thermodynamics only...
01:20
Anatomy of the Eyeball
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2024
The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle layer, the vascular tunic,...
01:21
Tooth Anatomy
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2024
The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth. The Crown, Neck, and Root The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or grinding food.
FAQs
Tissues contribute specialized capabilities that become integrated when arranged into organs. Those organs then interact through physical connections and transport pathways, allowing separate structures to contribute to shared processes such as circulation, digestion, respiration, and movement. Studying this organization helps biologists relate the arrangement of internal parts to the coordinated functions they support.
Physical connections and transport pathways allow organs to exchange materials and work as linked systems rather than isolated structures. Their arrangement provides a structural basis for processes such as circulation, digestion, and respiration. Examining these relationships helps reveal how the position and continuity of internal structures contribute to overall organismal function.
Comparative analysis examines internal structures across different species to identify similarities, differences, and specialized arrangements. These patterns can connect structural variation with adaptations to particular biological demands while also informing interpretations of evolutionary relationships. The approach therefore extends anatomy beyond one organism and places internal organization within a broader biological context.
Researchers can combine dissection, imaging, and comparative analysis to investigate internal structures from complementary perspectives. Dissection provides direct examination, imaging supports visualization, and comparison places observations across organisms or conditions in context. Using these approaches together strengthens the connection between observed anatomy, structural organization, and the functions or adaptations being studied.
Dissection is useful when direct examination of organs, tissues, vessels, or body cavities is needed. It enables researchers or students to inspect how structures are arranged and physically connected inside an organism. These observations can then support interpretations of function, system organization, and differences among organisms when paired with comparative analysis.
Internal anatomy studies provide a foundation for investigating development, health, disease, and evolutionary relationships. By connecting structural observations with function, researchers can examine how organized body systems support biological processes and how anatomical differences relate to adaptations. Dissection, imaging, and comparative analysis each contribute evidence for these broader questions.