Which organs are both endocrine and exocrine glands?
The pancreas and liver are both endocrine AND exocrine organs. As an endocrine organ, the pancreas secretes the hormones insulin and glucagon.
What is exocrine and endocrine glands and give examples?
An exocrine gland is a gland that secretes its products into ducts that lead to the target tissue. Examples of exocrine glands are sweat, salivary, sebaceous, mucous gland. Examples of endocrine glands are pituitary gland, ovaries, testes, thyroid gland, adrenal glands.
Which is the smallest exocrine gland?
3) Smallest exocrine gland is goblet cell which is unicellular. 4) Smallest endocrine gland is Pineal gland.
Which is the smallest bacteria or virus?
The smallest bacteria are about 0.4 micron (one millionth of a meter) in diameter while viruses range in size from 0.02 to 0.25 micron. This makes most viruses submicroscopic, unable to be seen in an ordinary light microscope.
Who is the father of cell biology?
George Emil Palade
What are the 4 parts of cell theory?
What is Cell Theory?
- Cells provide the basic units of functionality and structure in living things.
- Cells are both distinct, standalone units and basic building blocks.
- Energy flow occurs within cells. Cells contain genetic information in the form of DNA.
- All cells consist of mostly the same chemicals.
Why was the cell discovered?
The cell was first discovered and named by Robert Hooke in 1665. He remarked that it looked strangely similar to cellula or small rooms which monks inhabited, thus deriving the name. The cell walls observed by Hooke gave no indication of the nucleus and other organelles found in most living cells.
What are the main points of cell theory?
Cell theory states that living things are composed of one or more cells, that the cell is the basic unit of life, and that cells arise from existing cells.
How the cell was discovered?
The invention of the microscope led to the discovery of the cell by Hooke. While looking at cork, Hooke observed box-shaped structures, which he called “cells” as they reminded him of the cells, or rooms, in monasteries. The classical cell theory was proposed by Theodor Schwann in 1839.
What is cell theory explain?
: a theory in biology that includes one or both of the statements that the cell is the fundamental structural and functional unit of living matter and that the organism is composed of autonomous cells with its properties being the sum of those of its cells.