Item

Description

Call Number

PC0043

Type of Material

RVideo    'Pamphlet   'Data sheet   'Article   'Audio tape

'Model   'Statistics    'Book           'Poster    'Other:______

Title

Embryonic Period

Author

N/A

Publisher

N/A

Year of Publication

N/A

Target Audience

Biology College Students

Suggested Setting

Classroom

Length/Size (minute/page)

Approximately 1 minute

Information on the Web (if applicable)

N/A

Downloadable at

http://faculty.weber.edu/tltr/Videos/EMBRYONICstr.mov

Order Information

N/A

Cost (USD)

Free

Information updated

October 25, 2006

Reviewer

Shaquira Etan

Abstract

The embryonic period begins with fertilization and ends eight weeks later. Rapid growth occurs and the embryo's main external features begin to take form. The video covers week 4 through week 7. In 4 weeks, the embryo measures 4 mm (1/8 inch) in length and begins to curve into a C shape. The heart bulges, further develops, and begins to beat in a regular rhythm. Arm buds and a tail are visible. The stage of eye formation begins. In 5 weeks, the embryo measures 8 mm (1/4 inch) in length. The nose begins to take shape. In 6 weeks, the embryo measures 13 mm (1/2 inch) in length. Lungs begin to form. The brain continues to develop. Arms and legs have lengthened with foot and hand areas distinguishable. The hands and feet have digits, but may still be webbed. The spine becomes visible. In 7 weeks, the embryo measures 18 mm (3/4 inch) in length. Nipples and hair follicles begin to form. Location of the elbows and toes are visible. Spontaneous limb movements may be detected by ultrasound. All essential organs have at least begun formation.

Critical Comments

Potential audience. Teachers will use the video. It is intended to provide students with a visual understanding of the embryonic period. A broad audience of students with a wide age range can use the video.

Life. The video will last forever in terms of interest because the embryonic period is very important in human development. The embryonic will not change so the content of the video will remain updated and in demand.

Availability. The video is available free online. It is not difficult to access.

Content. The information provided in the video is accurate. I search several websites to evaluate its content and I found that the description of each week corresponds with other resources.

Purpose. The video will educate its intended audience. It does not need to be entertaining because it is used in a classroom setting to teach students about the development which occurs during the embryonic period. The video is also short in length, which will not affect student’s attention span or invoke boredom.

Depth. Is the depth and length appropriate for the intended audience?

Approach. The language in the video is simple and concrete. The picture of the embryo requires a mature audience level, which is provided by a college classroom, provides.  

Efficient. The content in the video is definitely worth the effort and time in viewing because regardless if a person is a student in a biology class every human being experienced the embryonic period. It is of great significance to everyone. The video is interesting and educational in it description of the development during the embryonic period.

Organization. The content is easy to follow because it follows the embryonic timeline beginning at 4 weeks through 7 weeks.

Visual Elements. The visual elements are viewable but not pleasurable to the eyes. The video is a bit blurry and small. It takes great effort to capture the developmental changes in the embryonic period.