egg sac

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Black widow spider

Figure 9: Eggs of spiders are enclosed in silk sacs. (Bottom) cave orb weaver (Meta menardii) with egg sac suspended from ceiling

Figure 9: Eggs of spiders are enclosed in silk sacs. (Top) Female wolf spider with her portable egg sac attached to spinnerets

Discover

Battle of the Alamo from "Texas: An Epitome of Texas History from the Filibustering and Revolutionary Eras to the Independence of the Republic, 1897. Texas Revolution, Texas revolt, Texas independence, Texas history.

6 Wars of Independence

New Zealand. Political/Physical map. Includes locator.

Where Is “Old Zealand”?

illustration of the walking titanosaurus, Patagotitan mayorum

Titanosaurs: 8 of the World's Biggest Dinosaurs

Rural Irish landscape, Sligo, Ireland.

Why Is Ireland Two Countries?

Ahura Mazda - relief of the Zoroastrian god Ahura Mazda at the ancient ruins of Persepolis in Iran. Also known as Ormazd Zoroastrianism,

Which Religion Is the Oldest?

African Americans demonstrating for voting rights in front of the White House as police and others watch, March 12, 1965. One sign reads, "We demand the right to vote everywhere." Voting Rights Act, civil rights.

Timeline of the American Civil Rights Movement

Lusitania sinking, illustration from The War of the Nations (New York), December 31, 1919. World War I, WWI. This image is one of three on the page. (See source file for the other two.)

7 of the World’s Deadliest Shipwrecks

egg sac

zoology

Learn about this topic in these articles:

spider reproduction

In spider: Eggs and egg sacs
Female spiders produce either one egg sac containing several to a thousand eggs or several egg sacs each with successively fewer eggs. Females of many species die after producing the last egg sac. Others provide care for the young for some period of…
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wolf spider adaptation

In wolf spider: Natural history
…contained in a gray silk sac that is attached to the female’s spinnerets, or silk-producing organs, so that she appears to be dragging a large ball. This adaptation is unique to wolf spiders. After hatching, the young spiderlings ride on the mother’s back for several days to weeks until they…
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