Kamis, 08 Maret 2018

Medusozoa

Jellyfish or jellies are softbodied, free-swimming aquatic animals with a gelatinous umbrella-shaped bell and trailing tentacles. The bell can pulsate to acquire propulsion and locomotion. The tentacles may be utilized to capture prey or defend against predators by emitting toxins in a painful sting. Jellyfish species are classified in the subphylum Medusozoa which makes up a major part of the phylum Cnidaria, although not all Medusozoa species are considered to be jellyfish.
(wikipedia)


https://www.maritimeprofessional.com/blogs/post/medusozoa-13574

Medusozoa is the scientific name for what are commonly and incorrectly referred to as jellyfish.  They are free-swimming carnivorous marine animals consisting of a gelatinous umbrella-shaped bell and trailing tentacles.  Medusozoa (or jellies) are found in all ocean waters at all depths, but most commonly in coastal waters.  They are the oldest multi-organ animals, dating back more than 500 million years.  While they have multiple organs, these organs tend to be, for the most part, relatively primitive.

The umbrella mass is covered on the aboral surface by a thin close-fitting layer called the epidermis.  Beneath the umbrella mass is another layer of skin, called the gastrodermis.  The gastrodermis is attached to the umbrella mass only along the edges.  At the center of the gastrodermis is the mouth, where food (primarily plankton, crustaceans, and fish eggs) are ingested.  Between the umbrella mass and the gastrodermis is the gastrovascular cavity where digestion takes place.  

Medusozoa have a loose network of nerves, primarily sensing touch, and some species have primitive light-sensing organs.  They move by radially expanding and contracting the umbrella mass, pushing water behind them.  Tentacles (over 100 feet long in some species) hang from the edges of the umbrella mass and from the gastrodermis.  The tentacles contain stinging structures, called nematocysts, used to pierce the skin and inject venom into prey (or predators).  Triggered by physical contact, a lance inside the nematocyst pierces the skin and venom is injected.  Different medusozoa have evolved different lances and venom, depending on feeding habits and its particular biosphere.  Some of these venoms are particularly painful to humans.  

The venom of several species can be deadly to humans, causing anaphylaxis (a severe allergic reaction affecting a number of body systems at the same time).  Application of a vinegar wash is a common first-aid treatment, followed by careful removal of nematocysts for the affected area and administration of antihistamines.  The pain, sometimes excruciating, may last for several hours.  Wearing of wetsuits is generally effective in preventing medusozoa attacks.  



QUESTION TIME!
1. Medusozoa have _____ organs.
A. Small          C. Multiple
B. Big              D. Simple

2. Medusozoa have a _____ network of nerves.
A. Loose          C. Glowing
B. Tight            D. Dark

3. When do Medusozoa injects venom?
A. When it is dark
B. When Medusozoa feels uneasy
C. When being triggered by physical contact
D. When being trapped

4. The deadly species of Medusozoa can cause?
A. Hipothermia
B. Anemia
C. Anaphylaxis
D. Blooding

5. What is the common first aid treatment for the venom?
A. Salt water wash
B. Sugar water wash
C. Alcohol wash
D. Vinegar wash

Rabu, 07 Maret 2018

Announcement Text Assignment

ANNOUNCEMENT TEXT
                    
ACTIVITY 1
Read the following announcement carefully and identify its elements.


 TEXT 1
Elements of the Announcement
Found/Not Found
Details
Opening
Found
“HELLO GEORGETOWN”

Contents

Found
Information about the opening of Ludlow Suit Shop.

Closing

Found
The address of
J. Crew Store.












TEXT 2
Elements of the Announcement
Found/Not Found
Details


Opening




Found 
 General information of H5N1 Avian Influenza that affect Indonesia and the results of the victims.
Contents
 Found
 Research on clinical disease and the research areas.
Closing
 Found
Detailed info of call for proposal.

TEXT 3
Elements of the Announcement
Found/Not Found
Details
Opening
 Found
 We are proud to announce we outgrew our old place

Contents

Found
New address of the computer store

Closing

Found
The contact info of the computer store












TEXT 4
Elements of the Announcement
Found/Not Found
Details
Opening
Not Found 

Contents
 Found
 Date of the opening
Closing
 Found
 Owner's hope to all of the customers














ACTIVITY 2
Read the examples below. Decide which of the following examples are considered announcement. State TRUE for announcement and FALSE for texts that is not an announcement.


NO
TEXT
TRUE/FALSE
1
TEXT A
TRUE
2
TEXT B
TRUE
3
TEXT C
FALSE
4
TEXT D
FALSE
5
TEXT E
TRUE 

Analyzing Invitation Text!

Purpose: Marriage invitation Greeting: “Together with their Parents” Contain: “Request the pleasure of your company to share in their...