Conjoined Twins Occur as a Result of

question 73

Multiple Choice

Conjoined twins occur as a result of

• A) complete separation of cells in the early morula.
• B) failure of the blastocyst to implant in the uterine lining.
• C) incomplete division of the inner cell mass.
• D) fertilization of the ovum by two different sperm

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Definitions:

Spinous Process

A bony projection off the posterior (back) of each vertebra, serving as a point for muscle and ligament attachment.

Spinous Process

A bony projection off the posterior (back) part of each vertebra, serving as a point for muscle and ligament attachment.

Costal Facet

A small, flat surface on a vertebra that articulates with the rib, contributing to the thoracic cage's stability.

Lamina

A thin layer, plate, or scale of organic material, such as the lamina of a vertebrate's bone or the lamina propria in mucous membranes.